Beth Armstrong, a bio-medical research scientist, insists on discovering the identity of her real father, irritating her neglected husband, Harold. Beth books a long over-due vacation, hoping to repair their marriage, but Harold's frustrations rises. He believes she's only on a quest to find information about her father, not to rekindle their lost passion. From the start their island adventure is doomed. After being accosted and robbed by a thug, Beth meets an old woman who knows more than she tells, while a young girl whose mother has disappeared enchants Beth. However a gang of barefoot boys on an old boat fire up some toxic trouble, causing Beth and Harold's diving adventure to turn deadly. Beth knows her marriage is lost along with the identity of her father unless she stops the murderer and convinces Harold of her devotion before their dream vacation becomes a lethal nightmare.