Marc faces expulsion from the Astronaut Training program. Paul takes Sarah to court because of her apparently irrational obsession that their son will get cancer. Taggart suffers from the effects of a Sentient-designed virus.

Chuck and the rest of Odyssey 5 remember a riot in a Houston suburb, and the date is approaching. People in the town are becoming angry, even to the point of killing loved ones - and afterward, they can't remember why. The rush is on to discover what's causing this rage, and how to avert the riot.