Smoke began to fill the garage.
"Uh...Hiro...the TV has smell-o-vision too?" Fred asked uneasily, still pigging down his popcorn.
Hiro's eyebrows furrowed. "No. It...did you leave-"
"Hiro, over here! Dude!" Wasabi shouted by the doorway. "Get out! Everybody get out! The place is on fire!"
"That guy - I knew he wouldn't just back down!" Go Go shook her head in disgust as she grabbed the fire extinguisher and moved to, instead of leave, extinguish the fire that lapped at the door. But then Hiro heard a quiet tick.
"Guys...I think there's a bug. He must've dropped bugs in here. Out!" he grabbed Fred from the couch and shoved him towards the rear entrance. Honey Lemon was on the phone in an instant, dialing 9-1-1. The others crowded outside just before the second and third bugs were set off, filling the night with smoke and an eerie orange glow. Hiro panted. The image before him was far too much like the one that had killed his brother...
"Baymax!" Hiro screamed. "Baymax is still in there! I-I have to go get him!" Before anyone could stop him, he was dashing back for the blaze.
Go Go dove towards him, grabbing him by the arm. "You go in there and you're as good as dead, bonehead!"
"Baymax," he shook his head and pulled away from her. "No. I can't lose him too."
"He's a stupid robot!" she screamed. "He's not your brother and he's not a real human being! We're out okay and that's what matters!"
Honey Lemon bit her lip before calling, "She's right, Hiro. You can build another-"
"No, I can't - all of Tadashi's-" he shook his head, but the fire company pulled in to begin dousing the flame before he could finish. His last piece of Tadashi was gone. Aunt Cass, woken by the ruckus, raced from their little apartment, consumed in a robe of marshmallow fluff and cotton candy slippers.

A gasp tore through her, and she ran for the group. "Guys! What on earth happened? Oh my goodness, is everyone alright? What were you doing?!"
"Cass, it's okay," Hiro set a hand on his aunt's arm, but she grabbed him in a fierce hug. When he pulled away, she gave him a reprimanding swat on the back of the head that was more concern than an actual hit.
"How did you burn the garage down?!"
Honey Lemon strode over. "There was a...a man...we don't really know who, but he came in and tried to fight us. We thought we'd chased him off, but he-"
"The dude was all-he had a metal arm and leg and he didn't say much of anything but he was intense! He planted freaking bugs in the garage to try and blow us up!" Wasabi cried out indignantly. He was staring at the garage, his eyes still nearly out of their sockets.
"It was pretty hardcore. Villain origin story," Fred explained.
"But we're all okay, Aunt Cass. Everyone got out," Hiro reassured her, but he cast a glance towards the garage. Except for Baymax. The rest of Tadashi's work is gone. His hat...everything...it's gone. Stupid, stupid, stupid, I should've just put all that stuff in a safe or a storage facility, somewhere it wouldn't-"Baymax didn't get out though," he sighed.
"Well, he's a robot. He can be rebuilt!" Cass gathered them into a big group hug. "I'm so glad you're all okay! Do you need to crash in the apartment for the night, or are you going home? Ohh, I'm glad I had insurance on that garage. We'll get it rebuilt. It'll be okay. No use getting upset. You're all okay. Right, you are -"
"Yes, Aunt Cass," came the chorus of answers.

A police officer, who had ridden in his patrol car behind the firetrucks, approached them. "Accident?"
They shook their heads, and so the police officer sighed, pulling out his notepad from his breast pocket. "Alright. What do you say happened?"
After they explained, the police officer rubbed his bulbous nose and then put his notepad away, yawning and explaining that he would collect evidence to search for the arsonist.
"We know who the arsonist is, though!" Hiro explained. Hadn't he listened to their story?
"Yeah, kid, well...a man with a metal arm and a leg who randomly came in to kill you all sounds kinda...I don't wanna say made up necessarily, but..we'll check into it. Maybe the FBI will check into it."
Hiro rolled his eyes, glancing back towards the rest of the group. Their suits had been ruined in the fire, he was pretty certain - since the garage now sat smoldering, black and in shambles - but they'd have to go after this guy. They'd have to.


Two weeks later, there was a knock on Aunt Cass' door.
"Hello?" Hiro asked, cracking the door and peering out. He'd been working on a project in his room - more like fighting with the formatting for Baymax Mark 3.
"Hiro Hamada?" the average-sized man had short dark hair and a receding hairline. He had a friendly looking face and held a folder close to his chest.
"Yeah?" Hiro asked, opening the door a little further. The man pulled a badge from his pocket and showed it.
"I'm Agent Phil Coulson with Strategic Homeland Intervention, Enforcement and Logistics Division. SHIELD, to say it easily. I'm here about the mystery man who attacked you and your friends a little while ago. It's actually...well...we'll talk about it later. Can we pick your friends up and go to my headquarters?"
Hiro glanced inside. Aunt Cass was working in the cafe. "Y-yeah...I guess. I'll have to tell my aunt though. I'll be right back."
When he came back, Coulson was waiting beside a slick red Corvette.
"We all clear?" Coulson asked, uncrossing his arms.
"Yeah-dude. That car!" he laughed, shaking his head. "Sick!" The boy reached out to touch it, but Coulson quickly opened the door and ushered him inside.
"Thanks. I rebuilt her. Her name's Lola," he explained awkwardly, but very prideful of his car.