A group of bikers, which includes some of the survivors from the original film, embark on a journey by bus to a biker race near the desert of the infamous incidents. However, because of a mistake they are late and decide to take a shortcut through the desert. Halfway through the desert the bus breaks down. While trying to repair the bus, some of the group wander off, and wind up in the traps of the survivors of the mutant family of the first. Then the mutants go after the rest.