Corey Webster (Josh Brolin), a young skateboarding champion from Carlsbad, takes a summer trip to the San Fernando Valley, where he begins training for a dangerous L.A. Downhill race, also known as "The Massacre." After joining the Ramp Locals - a group of local "thrashers" (kids who love to skate) - Corey ends up falling in love with Chrissy. One problem - her brother, Hook, is the head of the Daggers, the rival gang to the Ramp Locals. Can he beat Hook in The Massacre and get the girl?