Eager to escape a deeply traumatic past, a young Italian woman marries a charismatic Greek sea captain and relocates to the windswept island of Syros. But when her husband's shipping empire faces ruin, forcing him into prolonged absences at sea, she is left isolated under a hostile roof. Succumbing to loneliness and a dangerous, mutual fixation, she plunges into a passionate, forbidden affair with her husband's cultured younger brother—igniting a dark chain of events that spirals toward absolute domestic tragedy.