High school loser Rodney C. Duckworth is known as The Rodent until one unforgettable night when he borrows a cherry-new Chevy convertible and goes cruising for the girl of his dreams. With help of dim greaser Calhoun, hot-rodder T.J. Swackhammer and some very willing women, Rod goes from zero to hero during a wild ride of near- misses, direct-hits and bra-busting fun.

A mad stage hypnotist Dr. John Basso reverts his beautiful assistant Doreena into the physical form of a prehistoric sea monster she was in a past life. Using this power he attempts to find fame and fortune by predicting a series of murders and then using the monster to carry them out.