Marlo Ryan

Two adolescents learn the hard way about listening to their parents after they disregard their elders' advice, elope, and move out on their own. Unfortunately, they end up on the seamy side of town where they are victimized by the bride's vengeful ex-boy friend and his psychotic drug-addicted brother. The youngsters must also contend with other assorted criminals, including drug dealers and mobsters. (allmovie guide)

After a run-in with a tough motorcycle gang, where Gary Clarke is blamed when one of the bikers is sent out of control over a cliff, he and his girl are threatened and pursued. On to the beach riot, where the real culprit is unmasked and retaliates with his spear gun. (imdb)