The Teenager's Nightmare (1977)

The Teenager's Nightmare 1977 / 姦魔 1977 / The Criminals 5 , Xiang Gang qi an 5: Jian mo , The Criminals, Part 5: The Teenager’s Nightmare

The police have their hands full with a slippery rapist preying on helpless teenage girls. Gun: Three teenagers' lives change forever when they find a package containing a gun, hand grenades and ammunition. (IMDB)