Adam Webber (Brendan Fraser) has lived his entire life in confinement in a fallout shelter in Pasadena, Calif. When the Webber family's rations of food and supplies grow thin, Adam's eccentric father, Calvin (Christopher Walken), sends him on a dangerous restocking mission. When Adam emerges from the Webber family's subterranean refuge for the first time, he finds that rumors of a nuclear apocalypse were totally false -- and meets gorgeous Eve Rustikov (Alicia Silverstone).