"Shhh," Hiro said as they entered a huge concrete testing lab. "Any sign of him, Baymax?"He looked at Baymax's scanner. The signal had disappeared.

Fred chose that time to begin singing. "Six intrepid friends led by Fred, their leader. Fred. Fred's Angels. Uh-uh-uh. Fred's Angels. Uh-uhuh. Harnessing the power of the sun with the ancient amulet they found in the attic. Uh-uh-uh. The amulet is green. Uh-uh-uh. It's probably an emerald. Uh-uh-uh --"

Fred shrank back.

Sticking close together, the team crept down the stairwell.

"Oh, great," Wasabi said anxiously. "The robot's broken."

Wasabi silenced him with a look. "Fred, I will laser-hand you in the face!"

"Guys, you might want to see this…" Honey said.

"This structure is interfering with my sensor,"Baymax said, still trying to get a reading.

Everyone was on high alert as they scanned the lab. The place appeared to have been badly damaged. The ceiling had caved in, leaving a gaping hole. The walls were cracked, and chunks of concrete were scattered everywhere.

Two large circular structures that vaguely resembled portals of some sort dominated the room. One was intact but half dismantled. The other seemed to have been completely blown up.

"What do you think they are, genius?" Go Go asked Hiro.

Then Honey said, "Hiro." She was pointing to a flickering light. It was coming from a control room in a tower overlooking the lab floor.

The flickering light was coming from a bank of video screens. The biggest screen showed the graphic image of a bird. "Silent Sparrow" was printed underneath it.

Yokai must be up there, Hiro thought.

"I'm not sure. But look," Hiro replied, pointing to a bird symbol on one of them. It was the same one Hiro had seen on the metal piece Yokai was transporting across the bay.

"Krei…" Hiro said, a little shocked.

The paused video began to play. It showed Alistair Krei standing in the lab when it was sleek and new. A small audience that included military officials was listening as Krei said, "We were asked to do the impossible. And that's what we did. We've reinvented the very concept of transportation."

The team climbed a decrepit metal stairway, ready for battle. But when they burst into the control room, they found it abandoned.

Hiro walked over to the computer and hit a key. An image of Alistair Krei appeared.

Krei took the hat of one of the generals. "May I?"he asked. But before the general could answer, Krei tossed the hat into the closest circular portal. In less than a second, it flew out of the other portal.

Krei gave his audience a broad smile and pointed to two large circular structures -- the same ones the team had found in the lab. "Friends, I present Project Silent Sparrow." He nodded to the control booth, and the two structures powered up with a hum.

On the video, Krei handed the general his hat. "Teleportation: the transport of matter instantaneously through space. Not science fiction anymore," Krei said. The guests burst into applause.

"Whoa! A magic hat!" Fred said.

"No," Hiro said, impressed with what Krei had done. "Teleportation. Those circles are portals."

Next, Krei led his audience up to the control room. "Now, we didn't spend billions of dollars to teleport hats." His guests nodded and laughed nervously as Krei motioned to a video monitor. "Ladies and gentlemen, you're here to witness his tory."

The pilot gave a thumbs-up. "We've invited all these people; might as well give them a show," she said as she climbed into a flight pod set up to enter one of the portals.

Krei turned to his guests. "The first human teleportation in history, courtesy of Krei Tech Industries," he said with a flourish, and the countdown began.

Krei spoke into a microphone. The image of a young woman flashed onto the screen. "Ready to go for a ride, Abigail?" he asked.