Another yellow wrapper floated down onto the stone roof in a pile of other wrappers. The litterer was a boy dressed in indigo sitting on top of a furnace shoveling french fries and cheeseburgers in his mouth. The boy greedily inhaled the greasy food and slurped down water from a plastic bottle. That morning when the boy awoke he wandered the streets for loose change and eventually found enough that could buy him some cheap food.

A loud burp escaped the boy's mouth and he laughed. It had been years since the boy had tasted the greasy goodness of fast food burgers and fries. Now all the boy yearned for was a nice hot shower. He wanted to desperately wash off the blood and sweat on his body.

He jumped off the furnace then gathered the wrappers on the roof to throw away. Now the boy was ready to begin his plan, but first he needed to stake out the building. If he was going to sneak into Krei Tech, then he needed a sneaky way in. The last thing he wanted was to attract unnecessary attention to himself. Another group of heroes had already caught onto the boy and attacked.

The emerald disks appeared on his ankles and the boy was off. Tonight he would stop Alistair Krei from making a horrible mistake.

It took most of the day for Tadashi to update Baymax's sensor. Lots of sitting around and coding at his desk in his private lab. However in his downtime the teen was able to brainstorm new tech ideas that may be more useful than the drones he used. Blueprints were strewn all over the desks. Designs for electrical shock wave gauntlets, sound frequency radars, and others were on the desk. Yet none of the ideas stuck out to the teen. He eventually constructed a jet pack that would be lightweight for himself. This way at least on team member would be able to go airborne easier to see from a high vantage point.

A soft alarm went off and Tadashi rolled over in his chair to the 3-D printer. The improved helmet was finally done for the updated sensor on Baymax. Instead of it being a blue color it was a ruby red. Tadashi rolled back to his desk attaching the final pieces on the helmet. It took almost a whole day to figure out how to update Baymax's sensor to only search for certain qualities they wanted. Despite his wishes, Tadashi thought of his genius kid brother. Hiro would have been able to do what Tadashi accomplished in a day in only a couple hours. The thought of his younger brother made Tadashi sit the helmet down and lay his head on the desk. He missed his brother so much, while everyday did get easier, the boy still wished Hiro was around.

"Tadashi," Baymax waddled over to the raven haired boy, "Your body position suggests sadness. What is wrong?"

Tadashi signed and turned to the robot, "I just really miss Hiro."

A tear rolled down his cheek, but he quickly caught it wiping it off. It was not fair. Hiro was so young and bright. He would have changed the world with his ideas. Hiro was going to be able to help so many people, but that future was stripped away from him.

"Hiro is here," Baymax reassured Tadashi.

"Yea, I know buddy," Tadashi grabbed the helmet, "He's always here in our hearts."

"No, Hiro is-" Baymax was cut off as Fred and Wasabi rushed into the room panting.

"Tadashi!" Wasabi huffed for air, "Krei is calling us."

Fred nodded his head in agreement, but was unable to say anything due to the lack of breath. Tadashi completely forgot about what Baymax was trying to say and sat the helmet on a table near him. He took the phone from Wasabi then held it to his ear.

"Hello?"

"Ah Mr. Hamada I am so glad to hear your voice," Alistair Krei whispered back through the phone.

"Um excuse me for asking, but why are you whispering?" Tadashi looked back to the clock on the wall, he had gotten so lost in his work that he did not realize it was 10 o'clock p.m.

"Well you see, I am in a dilemma that could really use Big Hero 6's help."

Tadashi rolled his eyes. Krei knew that Tadashi and his friends were the heroes of the group Big Hero 6 because of the attack Callaghan launched on Krei. He had agreed to keep their identities secret which shocked the group. Yet, every now and then, the man would try to have Big Hero 6 around whenever he found himself in dangerous positions. After the first few times when the group did not come Krei had stopped asking. He was grateful that they did call the cops and give them an 'anonymous' tip to where he was being taken to. When Krei saw that the group was back out again on the streets and he was being threatened by a figure in indigo, Krei knew he had to try and get the groups help again.

"That guy in the fancy outfit broke into my office and set the whole building on lock down!" Krei's whispering got even softer, "He was looking for one of my top secret projects, but I don't know how he knew about it!"

Tadashi wanted to hit himself in the head. He couldn't believe that he let himself think this new vigilante was actually good. He let his emotions get in the way and didn't think logically.

"Hold on Mr. Krei," Tadashi grabbed the helmet again, "We will be there soon, I promise."

A relieved sigh came from the other end, "Oh thank you so-"

Krei's voice was cut off abruptly, "Mr. Krei?" Worry began to creep into Tadashi.

"I don't want to hurt anyone," The voice on the other end was deep and raspy, but it sounded familiar to Tadashi, "Do not come."

With that the call ended. Tadashi looked back to the door seeing not only Fred and Wasabi, but GoGo and Honey Lemon were there as well now. Everyone was already in their respective suits except Tadashi and Baymax. He guessed that he would just show his new equipment off at Krei Tech. He was also slightly disappointed that he spent all day working on Baymax's sensor to track down their target when Alistair Krei located him without any technological aid.

"Baymax and I will meet you guys in the parking lot," Tadashi ordered, "We will be down there in five."

Everyone nodded in agreement then left the room. Luckily, since it was so late there would be no one on campus so walking around in their suits would be okay.

Tadashi quickly put on his armor as well as Baymax's and they were flying out the doors to catch up with the rest of the group.

He had made a mistake the first time thinking that this boy was a hero; he would not make the same mistake twice.

"Please I'm begging you," A blonde man in a gray suit struggled in the chair he was tied up in, "Don't hurt me! I don't know what you're talking about!"

A fist flew past the man's face into the wall behind him. The man in the chair let out a shriek. He was used to being tied up and captured many times since he was the richest man in San Fransokyo, but nothing compared to the sheer terror he felt by this boy in indigo.

"I know that you know what I am talking about Alistair Krei," The boy hissed back, "I heard you whispering to Big Hero 6 that I was here and asking for your most top secret plan."

Alistair shook his head with his eyes closed, "No-no that was just a code word that we have, I swear!"

The boy dropped his head to his chest; he wanted his plan to run smoothly, but that was not going to happen. The stupid man in front of him was not cooperating and while he was looking for a certain file he didn't see the man calling for back up. If only he had paid attention, then everything would have gone so much smoother.

The boy in indigo drew his plasma blade and held it to the man's throat; he was not leaving without that file and if that meant using force then he would use force.

"Tell me where the file is at now!" He yelled at the man while pressing the blade closer to Krei's throat.

"Fine! Please just stop and I will show you!" Krei was openly crying now.

After a few more seconds the boy retracted the blade from the man's throat. He cut through the rope bonds on his hands and feet letting him stand. The boy immediately put the blade back on Krei so he would not try to escape.

Krei walked over to his computer and sat down stiffly. He felt the blade just barely grazing his shoulder blades as he typed in his password to access the file the indigo man wanted. One small mistake could end his life right now.

"There," Krei laced his fingers with a grim expression, "Project Arcane."

The boy shoved Krei out of the chair and sat there staring at the screen. This was it, everything he needed to destroy a terrible fate for this city. He took out a red flash drive then transferred the contents from the computer to it. Once the download completed the boy deleted the file. With one strike from his blade he destroyed the computer which eliminated the only light source coming from the room. The boy leaned down to Krei who tried to curl in on himself. The sight of someone being afraid of him hurt, but he knew that it was for the best.

"Who did you have working as the lead scientist?"

"His name is Renjiro Domen." Krei clenched his eyes shut; the man was petrified that the boy was going to kill him.

The boy nodded then simply walked to the large window, "It was never my intention to hurt you Alistair. It's just that this project cannot continue, trust me."

He did not give Krei another glance and slashed the glass window causing it to shatter. Once the glass settled the boy dove off the edge of the building.

"What do you mean?" Tadashi groaned, "He just apologized for robbing you and jumped out of the window!"

Krei nodded his head, "I know! It was so strange!"

Wasabi was studying the computer that laid in pieces on the floor. Whoever this mysterious man is knew exactly what they were doing with their plasma blades. The cuts were extremely precise and clean. Honey was examining the window where the boy jumped out. Several pink blobs were scattered on buildings. She was impressed; the boy must have the periodic table even more memorized than her to perform such a risky task at such a high altitude.

"Okay, just so we are all on the same page what exactly did Arakan steal?" Fred laced his fingers together and sat on Krei's desk.

Krei sighed while rubbing his face, "It was called Project Arcane, I hired this guy named Renjiro Domen to be the lead scientist because he had the most interest in it."

"This is, well I guess it was my most protected project here. It was a lot of theoretical business at first. Just discussing what could be possible if this invention actually worked. We began to talk about actually proceeding with the plan, but he showed up and took everything we had."

"You avoided the question," GoGo popped her gum, "What is it?"

"It was a time machine," Krei looked down at his hands, "We were going to break barriers that had never even been explored before. We were going to make science fiction a reality! But now it is all gone…"

Tadashi frowned. These pieces of information were not lining up. What use does Arakan have for a time machine that has not even been built yet? How did he even know about the project if it truly was as top secret as Krei said?

"You were building a time machine?" Wasabi stood from his position on the floor, "You do realize how dangerous that could have been right?"

Krei nodded slowly, "That is what is even weirder!"

"What do you mean?" Honey Lemon finally made her way back to the group.

"I was planning on shutting the project down soon anyway," Krei scratched his head, "A few of the scientists on the project were talking about how low the success rate would even be and all the catastrophic events that could occur. I actually had an appointment with the lead scientist tomorrow to discuss how the project was going to be discontinued."

"This doesn't make sense still guys," Tadashi rubbed his neck, "How does this all tie in with this new guy? What does he gain from taking a file for a time machine that hasn't even been put together? How did he even know about it?"

"We need to find that guy now and figure out what is going on." Tadashi turned toward his robot which was standing behind him.

"Baymax search for Arakan."

"Scanning for Arakan," Baymax slightly turned his head to search for Arakan, "Arakan found; he is currently on top of a building ten blocks from here."

"What are we waiting for?" GoGo placed her helmet back on, "Let's go catch this guy."

The indigo boy scrolled through multiple documents from the file he stole at a cracked computer. While the boy was trying to find an abandoned place to hide out he saw a computer laying on the ground and decided to grab it. He would be able to sort through the file and possibly use the spare parts to update his weapons.

Most of the file consisted of videos of a group of men talking about the machine they were trying to build. The boy went through that information quickly; he already knew about everything they were talking about. The boy continued scrolling until he reached the end where a mysterious file was placed. That was something the boy did not remember, so he clicked on the file to explore. Inside the file were several blueprints for the outline of the machine, each one specified on a certain part.

At the bottom of the file was another video, yet the boy did not remember this one. He clicked on it and let it play.

A tall man with curly brown hair appeared on the screen. He wore a pristine white lab coat with a name tag that said Domen. The boy glared at the screen. He hated that man; he was the one responsible for the destruction of his world. He swore to himself that he would not let this man ruin this world.

"Hello, my name is Renjiro Domen, I am the lead scientist for Project Aracan that is taking place at Krei Tech." The man on the screen walked over to a table and sat down, "One day soon, what we are making here at Krei Tech will be revolutionary to the world! Here at Krei Tech we are making science fiction a reality."

The man briefly explained what the project was for the next few minutes, so the boy skipped ahead to the end.

"I am doing this project for a certain reason, I didn't just wake up a random day and say that I wanted to make a time machine," The mad wiped his eyes, "I want to use this machine to go back in time myself."

"I had a daughter. She was the joy of my life," a few tears escaped, "One day, my daughter and wife were in a terrible accident that killed both of them. I want to go back to that day and save them so that they are still with me today. That is my true motivation for this project."

After the confession the video was over. The boy closed the file then laid his head down on the desk. He knew why Domen wanted to create a time machine in his world, but he had never seen that video. It was heartbreaking, and the boy knew exactly how that felt. He too had lost many people that was family.

He removed the flash drive from the computer. Now all the boy needed to do was make sure Domen was not going to try and make the machine on his own. But before he was going to do that, he needed to update his weaponry. The boy's emerald disks needed to be refined, he wanted to recreate another plasma blade, and he also wanted to create a new mask.

Repairs would have to wait for another day. The indigo boy was extremely tired and wanted nothing more than to sleep more than a couple hours. He walked over to a group of cardboard boxes and laid down. Immediately his eyes began to droop and he was asleep.

"Ok guys," Tadashi hovered in the air, "He should be here somewhere, I'll check the top floors while you guys check the bottom."

Everyone agreed then went their separate ways. Tadashi flew up to the top floor and flew through a broken window into the abandoned building. Everyone needed to be careful. The last time they went against the boy they got their butts kicked. Tadashi did not want to go through that experience again.

The small jet pack on the teens back turned off letting him gently hit the floor. There were no lights in the large room. Only stacks of cardboard boxes and white tarps littering the floor. Tadashi ventured further into the room quietly. As he crept toward the center of the room a small computer sat alone on the floor. He crept to the computer and inspected it. It was just an old cracked computer, there was nothing special about it. No files or anything were on there. He set the computer back down to continue exploring the room.

Tadashi went to go check the next floor, but stopped when a soft snore was heard. He followed the soft snores and found a boy laying in between a couple of cardboard boxes. He was laying on his side facing the wall. Tadashi leaned down to the boy and saw familiar indigo clothing. Lying next to the boy was a small pouch and plasma blade. Tadashi grabbed them then tossed them to the side far away from the boy. A black mask sat beside the boy as well. He picked up the mask and inspected it. There was a long hairline fracture in the mask.

Tadashi took of his own mask and put on the boys. Everything around him suddenly became clearer. The mask automatically changed to night vision. Several items popped up on the left side of the mask. Tadashi's heart rate and other vitals were seen. He removed the mask in awe. How did this boy do it? The mask was so advanced; Tadashi knew that he could never come up with anything like that.

He quickly fished his phone out of a pocket to send a message to the others. The others would arrive soon and they would figure out who the boy was.

Tadashi sat the mask down quietly beside him. This was it. All he had to do was reach a hand out to turn the boy over and he would see who this was. He could ask him any question he wanted.

He reached a hand out to the boys shoulder and tugged him toward himself. He was greeted with a long messy mop of raven hair. Tadashi held his breath as he began to push the boy's hair back. When the hair was pushed back Tadashi saw Hiro. Not the young Hiro that died but an older, more rugged version.

Tadashi scooted back quickly. He was not paying attention to his surroundings so he scooted into a tower of boxes. They all crashed down and the sleeping boy awoke suddenly. He stared straight at Tadashi with a look of fear. He looked down to Tadashi's hand and saw the mask and his gear close to him as well.

Now the only weapon the boy had were his emerald disks. This was not good.

"Tadashi where are you!" Honey Lemon called into the room.

Hiro glanced to where the voice came from then back to Tadashi. Neither one moved a muscle. Tadashi was unable to move. How was his baby brother in front of him? Why did he look so much older? He lost all of his babyish features. The chubby cheeks he used to have were sunken in with sharp cheekbones. He was tall and lean instead of short of gangly.

"Tadashi what are you doing on the floor!" Honey ran to him to help him up.

GoGo and the others were behind the two. Wasabi was the first to notice the unmasked boy in front of them though, and he was in as much shock as Tadashi.

"Hiro?" Wasabi took a step to the teen.

Hiro's eyes were open wide. How did he allow himself to fall asleep in such an open area? Now he was defenseless against the group and they knew his identity; the one thing he wanted to keep secret the most.

"Holy cow!" Fred took off his reptilian mask, "Hiro you didn't die!"

The group surrounded the boy into the wall behind him. Hiro needed to find a way out of this situation and quick. He could not face these people. His friends were gone. They were all dead and this group would not understand that he was not their Hiro.

Hiro changed his stance and activated the emerald disks. He would have to make do without the plasma blade and chemical pouch. He pushed through Fred and Wasabi and dashed to the exposed window. He heard yells behind him, but he ignored them. Without giving the group a glance Hiro ran down the side of the building.

The group of six all watched with fearful eyes of their friend running down the building.

"I have to get him," Tadashi activated the jet pack, "I have to get Hiro."

"Tadashi why don't you stay here, we can go after him," Honey placed a hand on his shoulder, "You are looking a little bit pale."

"Honey Lemon is correct," Baymax raised his hand, "Your blood pressure has spiked indicating stress, it is unadvised that you engage in extraneous activity."

"No," Tadashi flew out the window, "I am going to catch him."

With that the boy flew away in search for his brother. He ignored the yells coming from the abandoned building. The remaining five all looked at each other nervously. They needed to go find their friend and calm him down before anything bad happened. The calm expression that was Tadashi had could not be good.

Tadashi did not just make himself a cool jet pack. He made other little weapons that would be able to aid him in close combat. He intended to use said weapons on the person imitating his dead brother once he got closer.

Tadashi was right on the boy's tail. If he had more control of his jet pack then Tadashi would have caught the villain already. Since he did not have the most experience he remained where he was and decided to play the long game. He knew that the boy would mess up soon and that would be when he would strike.

The boy zigzagged through streets, alleyways, and on top of buildings. His thighs were starting to strain as he pushed himself further and further. He could not allow himself to get caught. All he needed was to find a safe spot to escape and regroup. The last thing the boy wanted was to engage in combat with the teen chasing him. Hiro did not want to harm Tadashi, but he also did not want to get caught.

Hiro turned abruptly into a small alleyway so he could race to the top of another building, but he was greeted face first with a rusted ladder. He crashed into the ladder making him skid into a nearby dumpster. He groaned at the pain from his head. That was going to give the boy an extreme headache soon.

Tadashi landed in front of the boy and screamed, "Who are you?"

Hiro raised his hands to cover his face, but did not respond. Tadashi growled and activated a small circular device and threw it on the boy. The device immediately exploded into a steel net and held the boy in place. Not even a second later the device electrocuted the boy on the ground. Hiro yelled as his body convulsed in the net.

After a few seconds the torture stopped leaving Hiro breathless on the ground. Tadashi stormed to him and lifted him into the air eye level to himself.

"Who are you," Tadashi growled out to the boy.

"Tadashi Hamada stop right now!" GoGo sped up to Tadashi and punched him making him release Hiro.

The others arrived shortly after GoGo. Wasabi and GoGo pulled Tadashi to the side to calm him down while Honey, Fred, and Baymax went after the boy that laid in a heap on the ground. Baymax picked Hiro up and sat him against a wall. Honey Lemon kneeled in front of Hiro. He looked so much older than the baby faced 14 year old that she remembered. He had grown into his features albeit he looked quite malnourished. Several scars littered the blemish free skin. What had happened to Hiro Hamada?

"Dude, you like arose from the dead," Fred laughed, "Where have you been?"

Honey frowned when the boy let his head fall to his chest, "Hiro?"

The boy did not stir. His head hung limp when Honey tried to hold it up, "Hiro!"

"Baymax scan him!" Fred yelled at the robot.

"Scanning...Scan complete," Baymax swiftly picked the boy up, "This Hiro has sustained multiple contusions and has a slight concussion. I advise that we take him to a secure location to better treat him."

"Wait, we don't even know if that is Hiro!" Tadashi ran to Baymax, "This can't possibly be him! My little brother is dead. He died when he was 14 years old; we buried him! "

"This is not our Hiro," Baymax simple replied, "This Hiro is significantly different, but he is still my patient. You programmed me to assist anyone in need of medical care."

Wasabi and GoGo walked over to Baymax. Tadashi was right, there was no way that the boy in Baymax's arms could be Hiro, but it looked exactly like the boy genius that they all knew. Even if this was not Hiro, they had to help him. Maybe if they helped him get better, they would be able to get answers easier.

"Tadashi, we understand that this has to be tough on you," Honey laid a hand on the boys shoulder, "But we have to help him."

Tadashi shook his head. He was not going to help someone that was going to dress up as an older version of his dead brother. The teen turned around and activated his jet pack and took off. He would not stay there; if his friends wanted to help the boy then they could, but he would have no part of it.

The rest of the group began the journey back to Wasabi's tan car about a block away. They would figure out what was going on even if Tadashi did not want to be a part of it. But before they could get answers they would help the boy.