Crusier, a teenager, steals some hubcaps for his homemade hotrod. Encouraged by his success, he steals more automobile parts and soon organizes four friends into a gang of thieves who operate out of a drive-in restaurant. The police name their gang "The Choppers," and insurance investigator Tom Hart is called to investigate the claims for stolen car accessories. The Choppers dispose of their loot through a fence, junk dealer Moose McGill, but the case is broken when Hart's car is stripped at the gang's headquarters. His secretary, Liz, finds chicken feathers at the scene of the crime, and this leads to the discovery of the use of a poultry truck as part of the gang's operation. The police set up a decoy, and Hart catches Crusier and the gang at the junkyard, but not before Crusier has killed McGill.