Baymax bobbed onto his back and placed the friends, gasping for air, on his stomach.

"I told you we'd make it!" Honey exclaimed.

Inside the car, the friends struggled to escape. They were losing air quickly. But just when things were looking hopeless, a big hand pulled them from their seats. Baymax had removed his body armor and inflated to a larger size than he had ever been before. Wrapping his arms around them, he floated everyone to the surface.

"I know a place," Fred said.

"Your injuries require my attention," Baymax told them. "And your body temperatures are low." Hiro agreed. "We should get out of here."

They settled themselves on Baymax for the ride to the dock. Go Go saw her gum float to the surface and happily popped it back into her mouth.

"And where are you going?" Hiro asked with a shiver as Fred went up the front steps.

Within an hour, Hiro and his friends were standing in front of a large mansion in San Fransokyo's most exclusive suburb. They looked around, confused. What was Fred up to?

"Where are we?" Honey asked, pushing her wet hair out of her face.

The friends walked into the vast entryway, stunned. "Freddie," Honey said, "this is your house?"

"Heathcliff, my man!" Fred greeted the butler with a fist bump before turning and addressing everyone else. "Come on in, guys! We'll be safe here."

"Welcome home, Master Frederick," he said in a British accent.

"Listen, nitwit, a lunatic in a mask just tried to kill us. So I'm not in the mood for any --" Go Go said, stopping midsentence as the door was pulled open by a butler!

Fred shrugged. "Well, technically, it belongs to my parents. They're on vacay on the family island."

"Welcome to mi casa," Fred said finally. "That's French for 'front door.'" He pressed the doorbell.

Baymax noticed Fred's greeting and fistbumped the butler, too. "Bata-lata-la."

He led them into his enormous bedroom. It was a virtual museum of rare comic books, Japanese monsters called Kaiju, and sci-fi action figures. A huge painting of Fred dressed like a barbarian riding a white tiger hung on the wall.

"I thought you lived under a bridge," Go Go said.

The friends settled into comfortable chairs while Baymax tended to their cuts and bruises. Hiro grabbed a notepad and started to sketch. "Your body temperature is still low," Baymax told him.

"So nice," Honey said with a smile.

Baymax leaned against Hiro's back and began to glow red. Heat emanated from his body. One by one, the friends were drawn to his warmth. Fred wrapped his arms around Baymax and laid his head on Baymax's back.

Wasabi stared up at the painting wide-eyed. "If I hadn't just been attacked by a guy in a Kabuki mask, I think this would be the weirdest thing I've seen today."

Hiro looked at Fred and sighed. "Yokai was carrying something with my microbots. This symbol was on it," he explained, hoping it was a clue to who might be behind the Kabuki mask. But for now it seemed like a dead end.

"Ahh. It's like spooning a warm marshmallow."

"Yes!" Fred said. "It's a bird!"

Hiro's sketch turned into a picture of a bird, the image he had seen on the metal structure the microbots had been carrying. "Does this symbol mean anything to you guys?" he asked.

"I have a theory!" Fred said, and ran to his carefully archived comics collection. He held up a comic book and showed them a masked super villain. "Dr. Sinister?" he asked the group. Fred frowned and turned the page. "Actually, millionaire weapons designer Malcolm Chazzeltick!" Then he held up another comic. "The Annihilator?" Fred asked, and shook his head. He showed one last picture. "Behind the mask, wealthy industrialist Reid Axworthy!"

"Apprehending the man in the Kabuki mask will improve Hiro's emotional state," Baymax said."Apprehend him?" Go Go asked. "We don't even know who he is."

Fred ran to his computer and pressed a key. "Don't you guys get it? The man in the mask, our Yokai, is none other than"-- the group gathered around as Fred hit another key --"high-tech tycoon Alistair Krei!"

"What?" Hiro said.

Fred nodded. "Think about it. Krei wanted your microbots, and you said no. Rules don't apply to a man like Krei!"

Hiro sighed. He was going to need more evidence than a guess from Fred in order to believe that the richest man in the world was also a crazed criminal. "There's no way. The guy's kind of high-profile."

Hiro didn't have an answer. "I don't know," he said. "I don't know anything about him." He looked over to Baymax, who suddenly displayed Yokai's vital signs on his chest screen.

"Then who was the guy in the mask?" Honey asked.

"His blood type is AB negative. Cholesterol levels elevated. Blood pressure one thirty --" Baymax said.

"Baymax, you scanned him?" Hiro asked, unable to contain his excitement.

The robot nodded. "I am programmed to assess everyone's health-care needs."

He looked from Baymax to his friends. "Actually, I need to upgrade all of you if we're gonna catch this guy," Hiro said, ready to head back to his garage.

Go Go was skeptical. She snapped her gum. "You'd have to scan everyone in San Fransokyo -- that might take… forever."

Hiro jumped up. "I can use the data from your scan to find him!"

"I'll scan the whole city at the same time. I just have to upgrade Baymax's sensor."

Hiro sighed. He knew she was right. He began to pace. "No, no, no, no. There's always a work-around." With his fingers, he tapped his head, trying to force an idea to come. And then he saw one of Fred's toys.

"No," he said, "you can be way more." Hiro looked up at the superhero art in Fred's room, and his mind swam with ideas. Yeah, Hiro thought, way better upgrades!

Honey approached the subject more calmly. "Hiro, of course we want to help, but he has all those microbots, and we're just… we're just us."

Wasabi said, "Upgrade us? What are you talking about? We can't go against that guy. We're nerds!"

Fred said, "Can you feel it? Our origin story begins!" He was giddy with delight. "We're gonna be superheroes!"