"We'll take the tunnel on the left. Bumblebee, lead the way," commands Optimus Prime.

Soon the Autobots are rolling towards - they hope - the surface.

"It's really narrow here," says Bumblebee. "It's going to be a tight fit for you big guys."

Unfortunately, Bumblebee is right. Ironhide, who is almost out of power, gets stuck at a turn in the tunnel.

"Nuts!" he grumbles. He revs his engine and rocks back and forth, trying to get loose.

And then he hears a sound that chills his transmission fluid. It is the buzzing of a scarab beetle. In his small insect form, Shrapnel has followed him. And now the evil Insecticon lands on his body just above the Sun-Pak.

"Bug off!" says Ironhide, but Shrapnel only chuckles.

Aiming his antennae carefully, Shrapnel disrupts the Sun-Pak's electronic lock. Then he takes the Sun-Pak and prepares to fly off.

"So long, Autobot," he sneers. "Next time we meet, I will be unstoppable!"

Continue.