Two college students decide to take a vacation to the Amazon. While in a small village getting supplies, they provoke the anger of a local scoundrel, whose ruffians beat them up. After renting a boat and sailing down the river in search of some good scenery, the two kids become lost and are forced to jump in the water to avoid a cascade. Now totally lost, they enter a small village, where the natives eye them mysteriously. It is here that they meet a bizarre jungle female, who happens to be the last survivor of a helicopter crash that occurred years ago. She soon develops a bond with the two adventurers...