The Ninja and the other Elemental Masters are scattered all around Ninjago after chasing down the decoy trucks. Aria had been battling none-stop for hours and is now hiding. Her energy is low so she can't continue fighting until it raises back up some.
Nya attempts to contact the elemental masters from the new Destiny's Bounty, but Chen takes over the airwaves and tells the masters, Nya, Misako, and his daughter that he wants to make a truce.
Garmadon points out that he's the reason the original truce was abandoned, though Wu inquires of his demands: if they, the Ninja and the elemental masters leave Ninjago for good, he won't cause anymore damage. Wu asks for time to think it over, leaving his brother stunned that he's even entertaining the Master, to which he says they need to buy more time.
Chen advises Garmadon that he should listen to Wu, due to his way with words, and ultimately reveals to Misako that it was Wu who wrote the letter that caused her to fall in love with Garmadon. Chen then reveals he lied about the truce, and only wanted to reveal the truth.
Angered, Wu declares that Garmadon is no sensei, though Skylor quickly breaks up the fight, telling Wu that since Chen divided the Ninja, he's now trying to divide the brothers.
In Chen's camp, Pythor is still running from the rodent, though he manages to escape and comes across the Book of Spells. Just then, Cyrus Borg delivers a message via the radio, that more villages have been over run. Pythor states a true Anacondrai wouldn't stand for it, which helps him decide to find a solution.
Elsewhere, Lloyd meets up with Neuro, who informs the Green Ninja that Chen's army is heading west. Lloyd instructs the Master of the Mind to send a message to the other elemental masters, ordering them to Nya's Samurai X Cave.
Once everyone has returned, Kai remarks to Skylor that the spell is wearing off faster, though she points out that Chen is still hurting everyone. Lloyd notices his uncle acting cold towards his father and realizes the truth behind the letter has been revealed.
Nya informs them that Chen has taken over the entire eastern coast in the time it took for them to get back. Nya also informs them that Chen has also captured Aria who's power levels are too low to fight back right now.
Gravis questions how they can stop them since almost all of them have lost their dragons, to which Wu points out that the Corridor of Elders will be the best place to make their final stand, and the elemental masters agree. The Ninja journey all over Ninjago to rally support from the citizens.
The Ninja, their allies, the Elemental Masters and the citizens of Ninjago, along with the Serpentine, the Nindroids, The Stone Army, the Skulkin, the Pirates, and the inmates from Kryptarium Prison, get to the Corridor and prepare to start the ultimate battle against the Anacondrai Cultists.
The group manage to keep the snakes from passing, and do what they can to make sure they keep the upper hand. As Shadow takes control of a bladecopter, Nya, Misako and the masters use the Destiny's Bounty to destroy the vehicles, managing to save Skales, who expresses relief at seeing the ship again. Having had enough, Chen uses the Roto Jet to widen the opening, allowing his followers to pass through the Corridor.
Lloyd made his way over to the snakes that held Aria and knocked then away.
"Lloyd" Aria said happily as he cut her ropes off
"I got you" he said hugging her
"Lloyd I ran out of energy" she said sadly
"I know" he said as the rest of the ninjas came over.
The ninjas sent energy to Aria giving her more power.
Pythor, having escaped Chen's camp riding the rat which he named Rodrigo, and carrying Chen's spell book, rides up.
"Lloyd take me to your father, I know how to end this" Pythor said
As Lloyd does so, Aria attacks Chen as revenge for tying her up.
"That's my girl" Lloyd smiled as he carries Pythor to the Destiny's Bounty.
"Garmadon you can stop the Cultists by sacrificing yourself and going to the Cursed Realm in the place of Arcturus and the other Anacondrai generals, so their spirits would be unleashed on the Cultists" Pythor informed him
Everyone is reluctant, but at the same time they know it must be done. Lloyd, however, gets angry at the notion that his father will desert him once more, and not come back this time, and he angrily departs from the Bounty. In a fit of rage, Lloyd dives into the battle and takes his anger out on the fake Anacondrai, as he remembers his past with his father.
Aria grabbed Lloyd's hand and he calmed down a bit. He held her hand feeling safe knowing she's still with him and is still on his side.
Wu begins to read the spell to open the portal to the Cursed Realm, while Misako tells Garmadon she's already forgiven him about the letter. As Garmadon asks her to tell Lloyd he's sorry, Lloyd returns, with Aria, saying he can tell him himself.
Aria takes the spellbook "dont drain your energy Sensei Wu, my powers are more suited for this" and she continued the spell from where he left off.
As the portal opens, Garmadon says " while i sought to make the world into my own image, I never realized I already had in my own son."
Aria finished the spell, and Garmadon violently ascends towards the portal. As he vanishes in an overwhelming flash of light, seven Anacondrai spirits, including Arcturus, come out from the portal.
The original Anacondrai curse Chen's entire army and turn them into ghosts, to which they too ascend to the Cursed Realm. Chen tries to reason with them, but Arcturus calls him a liar, a cheater, and an imposter, before he curses him and banishes Chen to the Cursed Realm.
The war ends, but Lloyd is sad because of his father's apparent death. Arcturus's spirit comes to Pythor and says that he made their ancestors' proud, and turns him into back to normal size. Pythor hugged Aria and she smiled.
Arcturus then thanks Lloyd for his and the others' help for doing what they couldn't: uniting all kinds as one. He then says that Lloyd and his friends are now Ninjago's greatest warriors, before flying away into another portal.
Later that day, the Ninja and the Elemental masters agree to keep in contact, and come to their aid should they need it. As Skylor begins to leave, Kai awkwardly but successfully offers her the chance to become a Ninja: though flattered, she declines as since Chen is gone, she is now owner of the noodle house.
Just before the two are about to kiss, Dareth interrupts the moment, where Skylor immediately says she'll put the Puffy Potsticker back on the Noodle House's menu. Dareth is satisfied, while Kai and Skylor agree to keep in touch before the orange ninja leaves.
Karlof gets everyone to clean up the Corridor of Elders, while the ninja, Nya, Wu, and Misako sit around a fire on a broken statue, watching construction workers building a statue of Garmadon in the Corridor.
Lloyd is comforted by his mother, while Kai holds a toast to the Anacondrai, the greatest warriors of their time. Jay then realizes it's their turn to make their ancestors proud.
"People look to the people that came before them to show them the way, their wisdom inspires us to move forward and to get better" Aria said softly
"Garmadon's loss will affect us all" Wu said
"it's his life that will affect us since he's the reason we were brought together" Misako correct
Lloyd held Arias hand "I am Lloyd Garmadon, son of Lord Garmadon, student of Sensei Garmadon. He made me who I am today: he was my father. He was my adversary. But in the end, he was my friend."
"because of him, we'll live to see tomorrow" Zane said
"We'll live to honor him"
Lloyd burns the book in the fire, as Jay says "because of Garmadon, we know we're ready to take on whatever comes next"
Cole smirked "if Skeletons, Serpentine, a giant dragon, a annoying dark princess, Nindroids and Anacondrai wannabes couldn't stop us, nothing could"
"That's for tomorrow to decide" Lloyd said
"...wait what do you mean annoying dark princess!" Aria shouted finally processing what Cole said.
The ninjas laughed "I'm not annoying!" She shouted and continued shouting at Cole for saying that.
"Oh just shut up princess" Lloyd said kissing Aria on the lips after.
The ninjas whistled and hollared.
"L-Lloyd!" Aria shouted her face turning super red. The rest of the ninjas and Lloyd laughed while Wu and Misako smiled at them.
As this goes on, a green ghostly figure appears spinning in the air. Indicating the spirits of the Anacondrai weren't the only ghosts that were released, and not the only ghosts who escaped from the Cursed Realm.
Aria looked up and saw this, her eyes went wide a single tear went down her cheek as she whispered to herself "Morrow..."