Devon discovers his people live on a huge spacecraft and is sentenced to death for heresy when he states this. He escapes, and his betrothed Rachel and friend Garth follow him on his journey.

The segment begins with Devon, Rachel and Garth at the ARK's communications board trying in vain to contact other parts of the earthship. A sudden ""Emergency"" signal flashing from the Medical Center sends the trio In search of the trouble.

Just as they reach their destination, they are ambushed by a club-wielding mob of raged-looking tube-dwellers who scream threats of death to the ""thieves"" who dare to invade the forbidden ""Dome of the Dead."" Devon and Rachel narrowly escape by barricading themselves in the Medical Center, but Garth, arriving too late, is forced to flee into the darkness.