Marta has just met Víctor when she invites him to dinner at her Madrid apartment while her husband is away on business. When her two-year-old son finally falls asleep, Marta and Víctor retreat to the bedroom. Undressing, she feels suddenly ill; and in his arms, inexplicably, she dies.What should Víctor do? Remove the compromising tape from the phone machine? Leave food for the child, for breakfast? These are just his first steps, but he soon takes matters further; unable to bear the shadows and the unknowing, Víctor plunges into dark waters.