A nerdy high school super whiz experiments with a chemical which will transform his guinea pig "Mr. Mumps" from a gentle pet into a ravenous monster. In a fit of rage against his tormentors at the high school, Vernon Potts goes on a killing spree, eliminating all of those who ever picked on him - the Gym Coach, the School Jock, The Creepy Janitor & his hated teacher, Ms. Grindstaff.

High school seniors and best friends, Sonny and Duane, live in a dying Texas town. The handsome Duane is dating a local beauty, while Sonny is having an affair with the coach's wife. As graduation nears and both boys contemplate their futures, Duane eyes the army and Sonny takes over a local business. Each struggles to figure out if he can escape this dead-end town and build a better life somewhere else.