Ever since Marnie lost her beloved husband three years ago and became a single mother, she has kept herself busy with a hectic work schedule. At her mother's emphatic recommendation, she finally takes a vacation and heads to a small town in Mexico, where she knows no one will see her as the poor, exhausted widow she is back home. She rents a house on the beach and everything is going fine except that there is something awfully suspicious about the American man living next door. The moment he sees her, he starts interrogating her—"Who are you? What are you after?" The bigger question is, who is he?