A real estate agent terrifies a couple with the grim fates of the previous owners of a house they're looking at.

On a class excursion to a cave with stone age paintings the clumsy Rex gets lost. A mysterious crystal opens a gateway in time and sets him back to the stone ages, where he meets a group of prehistoric fellows and the gorgeous Eba. While teaching her English and doing some pseudo-research on her fellows, his main goal is to get her sleeping with him. However the curiosity of the clan chief disturbs his attempts.

In the ravaged near-future, a savage motorcycle gang rules the road. Terrorizing innocent civilians while tearing up the streets, the ruthless gang laughs in the face of a police force hell-bent on stopping them.