An adulterous woman and her lover plot to murder her husband Kostas and make it look like a yachting accident. However, unknown to them, Kostas has hired a private detective to follow them and knows of their plans in advance. A deadly game of double-crossing begins and propels all three of them towards tragedy.

The film is inspired by the epic poem, "Astrapogiannos", of the Greek poet, representative of the Heptanese School, and politician, Aristotelis Valaoritis, and refers to the life of Lambetis, the son of Astrapogiannos.