Hiro and the team watched the video as the flight pod's engines fired up. The portal was humming. A computer-generated voice echoed through the lab: 'T-minus thirty seconds to launch."

A technician suddenly said, "Sir, we've picked up a slight irregularity in the magnetic containment field."

"All systems go for pod launch," Krei said.

One of the generals stepped forward. "Mr. Krei, is there a problem?"

"No, no problem," Krei said with a wave of his hand. "It's well within the parameters. Let's move forward," he said to the technician.

"Five, four, three, two… one," the voice said. "Pod engaged." And the pod shot into the first portal, but the moment it entered, alarms screamed.

The video was becoming shaky. A spinning vortex was forming at the center of the first portal. It was growing stronger and stronger. Items in the lab began flying into it. Suddenly, the vortex became strong enough to pull the concrete from the walls. The place was going to implode!

"Huh," Krei said, looking at the readout on the screen.

"We've lost all contact with the pilot!" a technician yelled. When the second portal exploded, Krei's audience scrambled out of the way.

"Oh, no," Honey said as they all watched the technicians panic. They understood that the pilot now had no way of exiting the portal.

"Krei, shut it down! Now!" the general shouted just as Krei hit a kill switch.

"The pilot is gone!" a technician yelled.

Hiro stared numbly at the screen. Now he understood why the lab was destroyed. He figured the government must have taken over Krei's equipment after the disaster.

"Krei's using my microbots to steal his machine back. But why?" Hiro asked.

The video screen in front of the friends went black.

Suddenly, a familiar sound drew everyone's attention to the lab. It was the sound of buzzing microbots -- millions of them! Hiro looked out the control room window. The white-and-red face of Yokai came into view. He was standing on a platform of microbots.

They watched the black-cloaked figure raise his arm and the microbots hurled a chunk of debris at the control tower.

Yokai smiled as he watched tons of rubble thunder to the floor. There was no way anyone could have survived.

The debris smashed into the tower's base. Hiro and his team held on as the tower buckled and swayed. A final wave of microbots leveled the entire structure.

Yokai was ready to command the bots to raise the portal up through the hole in the lab's ceiling. Then -- smash! Baymax's armored fist came crashing through the control room wreckage. Yokai spun around and saw Baymax throwing off steel beams and chunks of cement. He was stunned to see Hiro and the team come out from the wreckage.

But before Baymax could make a move, a wave of microbots knocked him back. Hiro ran to help him, leaving the remaining team face to face with Yokai.

Meanwhile, under the control tower wreckage, Hiro and his buddies huddled beneath Baymax. His huge carbon-fiber-covered body had protected them from the falling debris. Hiro gave Baymax a nudge. "Get us out of here!"

Yokai suddenly realized he had to deal with this annoying team of misfits before he could get the portal to safety.

Yokai turned his attention back to the business at hand -- moving the precious portal. He used the microbots to dismantle the last portions of it.

Hiro and the others came at Yokai with everything they had. "Go for the transmitter behind the mask!" Hiro yelled.

"All right, what's the plan?" Wasabi asked.

Fred leaped over Yokai. "Super-jump!" he yelled. "Gravity crush! Falling hard!" he narrated as Yokai swatted him away with a wave of microbots.

Go Go rode up a wall and flung her discs at Yokai. But Yokai dodged one while he deflected another. The discs flew past Yokai, just missing Honey as she lobbed a chem-ball. The chem-ball created an ice patch that caused Go Go to slip. She skidded on the ice and slammed into Honey, knocking them both down.

"Go for the mask," Go Go instructed.

"Right behind you!" Honey replied. The two of them took off together.

Yokai turned to Wasabi. Wasabi did his best to sound brave. "You want to dance, masked man? 'Cause you'll be dancing with these!" He waved his laser hands. "Hand over the mask, or you'll get a taste of THIS! And a little bit of THAT! Ha-ha!"

"Seriously, what's the plan?" Wasabi called.

Yokai threw a cloud of microbots at Wasabi. When Wasabi slashed at them wildly, the microbots seemed to scatter. Wasabi was thrilled. Then he looked down and saw that the swarm was covering his feet and climbing his legs. They lifted him off the ground and threw him into Fred. Fred unleashed a stream of fire that sprayed like an out-of-control garden hose as Wasabi knocked him to the floor.

"It's over, Krei!" Hiro said.

Yokai angrily sent a stream of microbots at Baymax and knocked him back. The jolt sent Hiro flying forward, slamming him into Yokai. As Hiro and Yokai tumbled down, Yokai's Kabuki mask flew off. All the microbots instantly fell to the ground.

Yokai was pleased. Most of the team was now out of commission. He turned his attention back to re-forming the microbot platform and raising the portal out of the roof. The job was almost done when Hiro, riding on Baymax, flew at him full force. Hiro was dismayed to see his friends all knocked out of the fight. They were a team, but they weren't fighting like one.

Yokai had his back to Hiro. But when he turned, Hiro's eyes grew wide in disbelief.