School is out, and three girls head to the beach for vacation. Two of the girls are world-wise party-goers who attempt to loosen up their naive, virginal friend, whose uncle has allowed the girls to stay at his beach house. When the near-sighted, drug smuggling Captain Bly dumps his cargo of marijuana, the bales wash up on shore. The two party girls, Ginger and Ducky, quickly stuff the dope into giant bags and spirit it back to the beach house, where it fuels a party with assorted misfits, delivery persons, and passersby.

Grief-stricken suburban parents refuse to accept the news that their son Andy has been killed in Vietnam, but when he returns home soon after, something may be horribly wrong.