Carmen is happily married to Tom, although she knows she'll always live in the shadow of the mistress who ended his first marriage: Zena, who drowned in the sea late one night. Zena seems ever-more present, and when Carmen unknowingly stumbles on evidence that her husband has not been telling her the whole truth, she can't shake her unease. As she uncovers documents and photographs, a very different tale than the one Tom has led her to believe begins to unfold, and she finds herself increasingly isolated and paranoid. As the twisted events of that night begin to come to light, Carmen must ask herself if it's really a truth worth knowing…even if it destroys her and the lives of the people she loves most.