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 (the inimitable Pia Zadora) 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.

Philo Beddoe is your regular, easygoing, truck-driving guy. He’s also the best bar-room brawler west of the Rockies. And he lives with a 165-pound orangutan named Clyde. Like other guys, Philo finally falls in love – with a flighty singer who leads him on a screwball chase across the American Southwest. Nothing’s in the way except a motorcycle gang, and legendary brawler Tank Murdock.

Dirty Harry Callahan returns again, this time saddled with a rookie female partner. Together, they must stop a terrorist group consisting of angry Vietnam veterans.