Aliens land in the mythical town of "Speelburgh, U.S.A" searching for the source of rock & roll. What they find is a gang of teenagers, led by Dee Dee and Frankie, along with Frankie's posse/rock band, the Pack. The leader of the aliens takes a shine to Dee Dee and all sorts of trouble breaks out.

It's five years later and Tony Manero's Saturday Night Fever is still burning. Now he's strutting toward his biggest challenger yet - making it as a dancer on the Broadway stage.