AllMovie

A serial killer has been targeting teenage girls in a small town, strangling his victims with pantyhose and drawing an "X" in lipstick on their foreheads. Lieutenant Anderson (Bill Bloom) is frustrated by the crimes, and thinks that modern parents have become too lax with their curfews. Local hot-rod gang the Fast Backs find themselves prime suspects, since an eyewitness says she might have seen their insignia, a bulldog, on the killer's back. Their only alibi is an illegal drag strip race (they're the number one group in the state), except for Jimmy (John Ensign), who is carrying on a forbidden romance with Betty (Jo Canterbury), and can't answer for his whereabouts. Tensions with fellow gang member Curly cause Jimmy to throw his Fast Backs jacket away, and a wild fistfight leads to a challenge to drag. When another body is found, the clues suddenly point to Curly, but a high speed chase and a terrible accident only complicate matters further. So who is the killer? Is it the creepy janitor? Is it the dweebish kid brother? There's lots of gutbucket rockabilly guitar and screaming sax on the jukebox in this juvenile delinquent thriller.