The story began when Team Redemption arrives at the Capital where they met Tatsumi, a young swordsman whom hopes of raising money for his impoverished village. After Tatsumi is robbed by a blonde girl in a tavern, he was forced to sleep in the streets while the team stays in an inn. Crona felt bad for Tatsumi, so he/she decided to accompany him but they were soon invited by a rich girl named Aria to stay at her manor. Come nightfall, a group of assassins known as Night Raid appears at the manor and kills Aria's guards and parents. During this time, Tatsumi shields Aria while facing off against Night Raid member Akame, only to be interrupted by Night Raid member Leone, the blonde girl from the tavern. Leone reveals to Tatsumi that Aria and her parents have tortured several people from the countryside, including Sayo and Ieyasu. Tatsumi filled with rage kills Aria without hesitation or mercy. Before anything else, Team Redemption arrives as Crona told them what happened, surprisingly both Sayo and Ieyasu are still alive but it's in the verge of dying, fortunately for them, Yukino Agria brought tons of elixirs that Gob the Goblin gave to her which immediately cured Sayo and Ieyasu. Then Leone invites Tatsumi, Sayo and Ieyasu to join Night Raid against their will while Team Redemption teams up with the Night Raid.
Leone takes Team Redemption, Tatsumi, Sayo and Ieyasu to the hideout of Night Raid and introduces him to the other members, all of whom Tatsumi views as freaks. Night Raid leader Najenda then convinces Tatsumi to join Night Raid, since it is their mission to overthrow the Empire and to set up a new democratic government in its place. Najenda assigns Akame to train Tatsumi, Leone with Sayo and Ieyasu with Bulat, but Tatsumi ends up merely cooking and fishing, much to Mako Mankanshoku and Ira Gamagoori's amusement. Tatsumi alongside Kevin Levin is later given the assignment to assassinate the corrupt captain of the Imperial Police named Ogre, who often framed innocent people as criminals. At night, Tatsumi and Kevin finds Ogre in the streets, where they draw swords at each other. When Ogre becomes arrogant, Kevin distracted him with a kick at the back before Tatsumi kills Ogre with the slash of his sword. As a cocky Tatsumi reports back to the hideout, Akame does a strip search on him, making sure he was not wounded. Since he has survived thus far, she accepts him as a member of Night Raid.
The next day, Najenda dispatches Night Raid and Team Redemption to take down eight tribal assassins trying to invade the hideout. The next morning, Tatsumi is assigned to train under Night Raid member Mine. It becomes an embarrassing situation when he walks in on her at the moment she is getting dressed. While roaming the streets with Mine, Kevin, Robin Nico and Crona, Tatsumi becomes frustrated because he mainly shopped around town with Mine for some clothes. Later on, Najenda sends Night Raid and Team Redemption on a mission to assassinate Iokal, a distant blood relative of Prime Minister Honest of the Empire. Iokal is responsible for kidnapping women and abusing them to death. At the mansion, Tatsumi alongside Mako and Crona watches as Mine uses her Imperial Arms Pumpkin, a powerful rifle gun, to snipe Iokal dead, despite Iokal being surrounded by innocent people. The last one of five bodyguards ambushes Tatsumi and Mine, having escaped from being killed by the rest of the members of Night Raid and Team Redemption. Tatsumi, Mako and Crona restrains the bodyguard, giving Mine the opportunity to snipe. However, Tatsumi is upset that Mine grazed his hair with her shot.
The next day, the members of Night Raidand Team Redemption discusses about their next target, Headhunter Zank, a former executioner who became addicted to beheading several victims at night. Najenda explains to Tatsumi and the members of Team Redemption about the origin of the Imperial Arms, powerful relics that are wielded, of which the members of Night Raid all currently possess. The Imperial Arms are so lethal that if two wielders choose to duel, one of them will ultimately perish. In the streets, Tatsumi and Akame alongside Ban, teams up to find Zank. Tatsumi is led away by an illusion of Aria, soon falling into a trap set by Zank, who uses his Imperial Arms Spectator, a headpiece that grants precognition to predict every attack. Akame and Ban then finds Tatsumi when he becomes wounded, and she and Ban takes his place to battle Zank. Zank tries to trick Akame by creating the illusion of Akame's younger sister Kurome. But Ban snatches Zank's weapon as Akame quickly destroys the illusion and then kills Zank, using her Imperial Arms Murasame, a sword with a poisonous blade. He rests in peace, now that he is no longer driven mad by the voices of the executed victims.
The next day, Tatsumi, Ieyasu and Sayo were surprised that they will be training under Night Raid member Sheele for the day. After Tatsumi learns how to swim while in his suit of armor, Sheele mentions her inability to do various chores, which explains her clumsiness. Sheele first discovered her abilities as an assassin when she rescued her best friend by killing her best friend's ex-boyfriend. Later, Tatsumi tries on Zank's recovered Spectator, but it rejects him when he attempts to activate it. The top priority of Night Raid is to collect every Imperial Arms known in existence, which are all documented in a book. The next day, Tatsumi and Crona were separated from Leone while patrolling the marketplace. He is aided back to the marketplace by Seryuu Ubiquitous of the Imperial Police, who possess the Imperial Arms Hecatoncheir, a doglike pet nicknamed "Coro". When she runs off, Seryuu intends to seek vengeance on Night Raid for the death of her mentor, revealed to be Ogre.
The next day, Tatsumi, Crona and Leone infiltrated a temple to assassinate a gang of drug smugglers, who have incapacitated and drugged a large group of women. Leone uses her Imperial Arms Lionel, a belt which gives her beast-like abilities, to take out the gang. Meanwhile, Mine and Sheele are ambushed by Seryuu, in which her Coro can regenerate and increase in size. While Mine uses Pumpkin to attack Coro, Sheele uses her Imperial Arms Extase, a huge pair of scissors, to chop off Seryuu's arms. Although it is revealed that Seryuu was concealing guns inside her arms, Sheele deflects the gunshot and slices off the guns. Coro goes berserk, grabbing Mine and crushing her to death. When Sheele rescues Mine, Seryuu fires a shot from a gun concealed in her mouth at Sheele. Mine watches in horror as Coro was about to bite Sheele but was saved by the timely arrival of Satsuki Kiryuin and Nonon Jakuzure, Satsuki takes down Coro while Nonon knocks out Seryuu but rather than killing her, they decided to bring her back to their base as their hostage.
Meanwhile, the Emperor of the Empire orders General Esdeath of the Empire to hunt down Night Raid and the unnamed group(Team Redemption) in exchange for a marital suitor. Esdeath then dispatches the Three Beasts (Daidara, Nyau and Liver), an elite group of Imperial Arms users, to take out Prime Minister Chouri and his daughter Spear from the northern tribe, who were political rivals against Honest, Spear's father and troops were killed but Spear was saved by three unknown individuals. The Three Beasts then spread flyers to frame Night Raid for the murders. Najenda sends Ban, Crona, Tatsumi and Night Raid member Bulat aboard a massive luxury liner. There, Nyau uses his Imperial Arms Scream, a flute that weakens those who hear its melody, but Tatsumi resists its sound. Tatsumi is then confronted by Daidara, who uses his Imperial Arms Belvark, an axe that splits into two blades. Bulat intervenes and uses his Imperial Arms Incursio, a sealed white sword that releases into a suit of armor, to kill Daidara. Bulat recognizes Liver as a former general of the Imperial Police.
Liver uses his Imperial Arms Black Marine, a ring that controls any form of liquid, in which Bulat has the disadvantage due to being surrounded by an ocean but was aided by Ban. Meanwhile, Tatsumi and Crona fights against Nyau, who is very quick on his feet. Liver unleashes a special attack, which causes Bulat and Liver's Imperial Arms to wear out due to critical damage. After Bulat turns down Liver's offer to join Esdeath's army, Ban, Bulat and Liver engage in a fight to the finish. Bulat manages to mortally wound Liver, who dies after revealing that he joined Esdeath because of his respect and admiration for her. Bulat realizes that Liver injected poison into his blood as a last resort, in which Liver manipulated his spilled blood to pierce through Bulat but was saved when Ban handed him an elixir but remains injured. Crona then finishes off Nyau but unleashing Ragnarok, completing their mission. However due to the injuries Bulat sustained from his fight with Liver, he decided to entrusts his Incursio to Tatsumi.
Meanwhile, Gaara decided to have a conversation with Seryuu in her cell.
The next day as Mine and Sheele were fully recovered from their injuries, they sees Tatsumi, Ieyasu and Night Raid member Lubbock doing pushups with Akame, Sayo and Leone literally on their backs. Najenda assigns Gaara as temporary leader before planning to leave to recruit new members. Meanwhile, the Jaegers (Wave, Kurome, Dr. Stylish, Run and Bols) assembles and Esdeath brutally introduces herself as the leader of this group, whose mission is to hunt down the enemies of the Empire. Lubbock then invites Tatsumi, Leone, Mako and Crona into his library, where he explains that Najenda was disgusted with Esdeath's excessive cruelty against the southwestern tribal army many years ago. Esdeath sponsors a tournament, secretly to find her marital suitor. Tatsumi enters the tournament under the guise of a blacksmith. After Tatsumi flawlessly defeats a bullheaded opponent in the arena and wins the tournament, Esdeath suddenly becomes infatuated with his prowess. As she approaches him, she shackles him and takes him inside the palace. Akame, Leone, Mine, Lubbock, Sheele, Bulat, Sayo, Ieyasu and Team Redemption(minus Gaara) learns about this and discuss whether or not they should rescue Tatsumi.
Meanwhile, Gaara is doing some sort of therapy session with Seryuu in her cell. Surprisingly, Seryuu was listening to him in with genuine interest.
The next day, Esdeath and the Jaegers raid and destroy a fortress of bandits, and Tatsumi is forced to watch. Later, as Esdeath tries to get intimate with Tatsumi in her bedroom, Tatsumi resist temptation and tries to convince her to join his side. However, she slaps him, saying that she will never change for him, despite his debate that the Empire is corrupt. The next day, Esdeath assigns Tatsumi and Wave to the west part of the mountains, tasking them to take out a group of Tree Beasts. Although Tatsumi uses Incursio to escape into a forest, Wave uses his Imperial Arms Grand Chariot, a sealed black sword that releases into a suit of armor, to follow Tatsumi. After Tatsumi manages to swiftly run away, he encounters a Jackaleo. Akame and Ban arrives and kills the Jackaleo, while Lubbock takes Tatsumi, Ban and Akame back into the mountains. At the palace, Esdeath punishes Wave brick by brick for allowing Tatsumi to escape, yet Esdeath is still determined to get Tatsumi back. At the library, Tatsumi tells everyone about Esdeath and the Jaegers.
Meanwhile, Gaara continues the therapy session with Seryuu and with a noticeable difference... they are not inside a cell.
The next day, Dr. Stylish and Team Stylish (Hana, Kaku, Me, Mimi, Toby and Trooma) find and attack the hideout of Night Raid. Tatsumi struggles to fight Kaku but Mine steps in and uses Pumpkin to blast him down. Meanwhile, Akame and Ban battles Toby, whose mechanical body is equipped with guns and swords. Lubbock uses his Imperial Arms Cross Tail, a reel of strings that can be manipulated, to form a spear and stab Toby in the chest. Trooma tries to attack Mine from behind, but Leone and Kevin intercepts with a surprise attack and kills him with a single blow. Dr. Stylish's foot soldiers surround Ban, Kevin, Tatsumi, Akame, Leone, Mine and Lubbock, and all but Tatsumi are afflicted by Dr. Stylish's paralytic poison injected into the foot soldiers. Najenda rides on an Air Manta and dispatches Susanoo, who easily defeats the foot soldiers. As Kevin and Ban kills Hana, Me and Mimi, Dr. Stylish was left alone however instead of fighting back, he was marveled and gained interested at Kevin and Ban's abilities and decided to turns his back at the Empire to join Night Raid. Although they were skeptical at first but Stylish decided to tell them several information about the Empire and the Jaegers which was more than enough to let him join their side.
As this is going on, Gaara and Seryuu are seen meditating outside the hideout.
The next day, Tatsumi, Akame, Leone, Mine, Lubbock, Sheele, Bulat, Sayo, Ieyasu, Stylish and Team Redemption(minus Gaara) were introduced to Chelsea and Susanoo, Najenda's newest recruit and a humanoid Imperial Arms. Later Crona, Tatsumi and Leone take out a horde of Marg Dons in the forest. Chelsea then uses her Imperial Arms Gaia Foundation, a cosmetics box that allows her to take on any appearance, to change into a cat and steal cake from Mine, who becomes very angry. Chelsea later berates Night Raid and Team Redemption for being incompetent. Mine convinces Crona, Tatsumi and Lubbock to teach Chelsea a lesson for what she said. Lubbock tells Tatsumi to sneak up on Chelsea while she is bathing in the hot springs bath. It turns out that Chelsea used Gaia Foundation to take on the appearance of Susanoo to confuse Crona and Tatsumi at first. She reveals to be the only survivor of her former team that was massacred in the past, hence why she berated Night Raid in the first place. Elsewhere, Esdeath is told by Run about a list of lookalikes of Tatsumi, but she declares that there is only one Tatsumi whom she loves.
Meanwhile, Honest assigns Esdeath to track down various Danger Beasts, which have appeared in forests and mines. Bols saves two merchants from being attacked by Humanoid Danger Beasts, but Wave witnesses the merchants being terrified of Bols due to his fearsome appearance. Later, Bols explains that despite his nice personality, he used to be an executioner and burned down many infested villages. Bols is visited by his wife Kije and daughter Logue, who are very well aware of his line of work. While training with Susanoo, Tatsumi, Ieyasu and Sayo considers him as a companion rather than just a tool. The members of Night Raid and Team Redemption were given the mission to kill Humanoid Danger Beasts, intentionally helping the Imperial Army. Meanwhile, Esdeath and Run discuss that the Humanoid Danger Beasts, therefore the Humanoid Danger Beasts must have somehow escaped their containment. While patrolling the mountains at night, Tatsumi learns that Lubbock joined Night Raid to get closer to Najenda, though his love is unrequited. Tatsumi travels alone to the summit, where he suddenly encounters Esdeath, who is shocked to see him.
The reunion of Tatsumi and Esdeath is cut short when Honest's son Syura appears and uses his Imperial Arms Shambhala, a pendant capable of spatial manipulation, which teleports the two to a remote island. When two Modified Danger Beasts appear, Tatsumi and Esdeath slay each of them. After Tatsumi and Esdeath explore the island, they find out that they were teleported by a trigram circle symbol created by Syura. Esdeath reveals that she lived by the law of "survival of the fittest" and became a general in the Imperial Army, as a result of the northern tribe killing her late father and her former clan of Danger Beast hunters. She also selected the Imperial Arms Demon's Extract, the blood of a Danger Beast which she drank in order to create and manipulate ice. When Syura's portal reappears, Tatsumi and Esdeath pass through and return to the mountains. Tatsumi uses his Incursio to hide before Esdeath has the chance of seeing him.
Back at Night Raid's hideout, Gaara re-introduces Seryuu to everyone as she announces that she has turn her back at the Empire but didn't joined Night Raid but instead, she decided to join Team Redemption which Gaara stated that Seryuu is their fourth honorary member.
Meanwhile, in an inn somewhere at the Capital, Spear is seen alongside three individuals named Sabo, Koala and Hank Hill, three honorary members of Team Redemption. They were having a conversation about what to do next when Sabo announces that they'll be meeting up with Team Redemption soon.
The next day, Najenda prepares a strategy meeting for Night Raid and Team Redemption after they sit down to eat. Najenda tells Night Raid and Team Redemption that they will launch attacks against the Empire during an uprising caused by Path of Peace, a pacifist religious organization. Night Raid and Team Redemption were is assigned to assassinate Bolic, the assistant to the leader of Path of Peace while working as an agent under Honest. Bolic has been drugging members of Path of Peace to become his slaves and prevent them from an insurrection on the Empire. The members of Night Raid and Team Redemption have fun at the beach before carrying out their mission. The Jaegers split into two teams, in which Esdeath and Run head east, while Wave, Kurome and Bols head south. At a canyon in the south, Night Raid and Team Redemption confronts Wave, Kurome and Bols. Both Wave and Bols were shock to see Seryuu and Stylish are now part of their enemies as Kurome uses her Imperial Arms Yatsufusa, a katana that turns her victims into zombies.
Kurome's puppets (Death Tagool, Natala, Doya, Apeman, Henter, Wall, Rokugou and Kaiser Frog) emergex, and the battle in the canyon begins and at the same time, Emotionless suddenly made their appearance, surprising both factions. As the battle ensues, most members fights off the Emotionless while Sabo, Koala, Hank and Spear arrives to aid Night Raid and Team Redemption. While Susanoo and Ban fights Death Tagool, Mine and Kevin pursues Doya. Tatsumi becomes overwhelmed by Apeman and Henter, until Chelsea later disguises herself as a tribesman to distract and kill Henter with a poisoned needle to the head, leaving Tatsumi to finish off Apeman. While Crona, Leone and Najenda take on Rokugou, Kurome slices off Leone's left arm, forcing Najenda and Crona to kill Rokugou herself. As Akame combats Wall and Bols at the same time, she tells Bols that she joined Night Raid because she believes it in her heart to be the right path. Mine and Kevin were swallowed by Kaiser Frog, but they manages to pierce through Kaiser Frog and escape. Susanoo uses his trump card, transforming into an armored form gained from Najenda's life force, to kill Death Tagool. After Satsuki, Leone and Akame team up to kill Wall, Bols uses his Imperial Arm Rubicante, a powerful flamethrower. Since Rubicante is damaged from the battle, Bols throws it upward and detonates it, causing a massive explosion around him.
Despite the massive explosion, everyone survives. As Chelsea, Ban and Nonon chases after Kurome, Stylish had a talk with Gaara and told him that he wants Bols to join them. Later, Gaara and Stylish met Bols in a forest and managed to convinced him to switch sides. Meanwhile, Chelsea, Ban and Nonon catches up with Kurome and managed to take down Natala and Doya while Ban defeats Kurome. But instead of killing her, they decided to take Kurome as hostage in hopes, she could change sides like how Gaara did with Seryuu.
And with the three honorary members, Spear and Bols joining them, Night Raid and Team Redemption got even more stronger.
Meanwhile, somewhere in the Capital, three girls named Fal, Air and Luna were sold to a sadistic group by a man named Bach but were saved when Solo Hero, Gelman arrived and killed Bach and the sadistic group. Gelman then decided to bring the three girls back in Neo-City for medical treatment.
The next day, Esdeath and the Jaegers are ordered by Honest to protect Bolic, who summons the Four Rakshasa Demons of the Imperial Fist Temple (Ibara, Sten, Mez and Suzuka), who are able to manipulate their bodies in a myriad of ways. Then, Bolic sends them on the offensive. Meanwhile, Night Raid and Team Redemption enters Kyoroch, the headquarters of Path of Peace. Ban, Sabo, Tatsumi and Mine explores the busy marketplace. At a cemetery, Koala and Akame takes on Ibara, using their skills to defeat him. In the city streets, Lubbock and Hank fights Sten and Mez, Hank knocks out Mez with a very powerful aura-infused punch while Lubbock uses Cross Tail to crush Sten's heart from the inside and Lubbock was about to kill Mez but Hank stops him, deciding to take her as a hostage instead which Lubbock agrees. On the outskirts of town, Tatsumi and Mine quarrel as they encounter the Lord, the leader and founder of Path of Peace.
The next day, Night Raid and Team Redemption plans to infiltrate the palace during the anniversary festival of Path of Peace. Susanoo cooks favorite meals for the members in preparation for the mission. Tatsumi and Mine wear disguises as a diversion to get out of the city undetected, but Suzuka spots them and attacks them while at the same time, a bomb-type Emotionless pops out of nowhere. As Tatsumi fights Suzuka while Mine fights the Emotionless alone. Tatsumi defeats Suzuka with the aid of Ira but didn't kill but instead decided to take her hostage. As Ira takes Suzuka back to their hideout, Mines manages to wound the creature but it retaliated by setting off a suicide bomb implanted in his body. Mine's legs become exhausted when she tries to run away, but Tatsumi ends up saving her from the blast. Meanwhile, the rest of Night Raid and Team Redemption storms to the palace. Although Esdeath advises Bolic not to leave, he later attempts to flee, only to be killed by Akame and Lubbock.
Chelsea, Tatsumi and Lubbock covertly meet up with the palace maid working as a member of the resistance. At the entrance to the palace, they soon find themselves surrounded by Syura and his elite unit. Great General Budo of the Empire appears and uses his Imperial Arms Adramelech, a pair of gauntlets that generate electricity, to attack Tatsumi and Chelsea. Lubbock struggles as Syura repeatedly warps himself on the ground and in midair using Shambhala. When the palace maid restrains Lubbock, she is injured by Syura, who is blindsided when his right hand holding Shambhala is cut off by Lubbock. However, the palace maid stabs Lubbock in the back. Syura teleports Lubbock into an abyss, but Lubbock uses Cross Tail to pull Syura into the abyss. Lubbock kills Syura by crushing his heart from the inside, which then sends them both to high above the palace. After Cross Tail breaks, Syura's men was about to kill Lubbock but was saved by Hank and Spear. As Chelsea was blown away by Budo, Tatsumi, after being captured by Budo, is sentenced to death by Honest. Esdeath tells Honest to give her the honors to conduct the execution.
With both Lubbock and Chelsea still injured, Akame, Leone, Mine, Najenda, Susanoo, Sheele, Bulat, Stylish, Bols, Spear, Team Redemption and their honorary members prepares for their mission to rescue Tatsumi. Meanwhile, Tatsumi refuses to join Esdeath for her cause. During the execution in the coliseum, Night Raid and Team Redemption attacks just as Esdeath is about to kill Tatsumi. Akame, Sabo and Kevin enters the palace and defeats the Imperial Police in order to retrieve Incursio. As Najenda, Susanoo and Gaara confronts Esdeath, Najenda has Susanoo uses his trump card to repel any attack Esdeath throws at them. As Satsuki, Leone and Mine fight Budo, Leone and Satsuki becomes paralyzed, leaving Mine to take on Budo by herself. Mine and Budo each channel and release their strongest blast from their Imperial Arms. Mine obliterates Budo, but she is left heavily wounded but was healed by the timely arrival of Stylish and Yukino. Akame, Sabo and Kevin frees Tatsumi. Esdeath uses her trump card to freeze time and destroy Susanoo's core, but Najenda uses her trump card in retaliation to restore Susanoo. While Susanoo and Gaara keeps Esdeath busy, the rest met up with each other and witnessed Mine confessing her feelings to Tatsumi before sharing a kiss.
Wave learns that Run joined the Jaegers in order to reform the Empire, which is filled with corruption and rebellion. The two later cross paths with Mako, Bulat and Sheele but instead of engaging in a fight, the two decided to join forces with them in taking down the Empire. Elsewhere, Honest instructs the Emperor to activate the ultimate Imperial Arms in order to stop the revolution.
As Night Raid and Team Redemption starts their final mission to assassinate Honest. Under Honest's influence, the Emperor activates his Imperial Arms Shikoutazer, a suit of armor as tall as a mountain, and causes destruction in the Capital. Sabo and Tatsumi tries to convince the Emperor to have compassion for the citizens, but the Emperor becomes selfish in his cause to maintain power. Wave joins Tatsumi in the battle against the Emperor. After Tatsumi manages to strike the core of Shikoutazer, he unlocks the true power of Incursio to defeat the Emperor and with their combined efforts, they destroyed Shikoutaizer.
And with the Emperor defeated, Honest tried to flee but was cornered by Leone, Spear, Nonon, Kevin and Hank and even with his Teigu, Arms Erase Stone, Honest is no match from everyone's combined strength and was killed by Leone. Meanwhile, Akame and Gaara takes on Esdeath and with their combined strength, they defeated her.
And with the Capital, free at last from corruption, Najenda sentences the Emperor to death for corrupting the Empire as she takes responsibility to help rebuild and restore the Capital.
Meanwhile, Gaara offered Night Raid and the remaining members of Jaegers to join the Heroes Coalition which they accepted. Thought Sayo and Ieyasu decided to become trainees while Spear decided to join Team Redemption as it's fifth honorary member while Stylish joins the Science and Research Department.
Mez and Suzuka, after taking therapy sessions, decided to join the Heroes Coalitions. Akame and Kurome finally made amends with each other while Esdeath was sent to a rehabilitation center.
And with that, Night Raid and Team Redemption's adventures in the Capital concluded. But what adventures awaits for them next?
A/N: Inspired from someonestupED, damnlastwords, Hope the Victor and Ace Neptune. All OCs and concepts not created by moi were given permission for me to use by it's respected creators.