A mysterious comet is approaching the earth; described by the opening narration as a force of concentrated evil that no force of good can stand against. As it comes closer, South Park is beset by enemies; including rabid mutant turkeys, deformed clones of the townsfolk, alien visitors, berserk robots, and sentient killer toys. Stan, Kyle, Cartman and Kenny hear about the dangers from Chef, and take up arms to investigate their sources and defend the town.