 Nellie Stope lives with her grandfather on a remote island off the Florida coast. Her grandfather fled there for political reasons. But they re not alone. An escaped prisoner, Nicholas, is terrorizing them, and further more, he s interested in Nellie. John Woolfolk has lost his wife in an accident and tries to forget by sailing in his yacht aimlessly on the ocean. By chance he drops anchor in a bay of that island. He soon finds out that something is wrong on that island, and furthermore, he falls in love with Nellie, who sees in him a chance to get off that island. But Nicholas has threatened her with rape and murder if she tries to escape, and he has found out about her plans...