When he meets Anaíra, a beautiful woman who breathes life into his whole being, Captain Dalberto leaves his job as a police officer and buys a boat. The newly married couple moves in with Dalberto's brothers, but the captain leaves for a trip to Iquitos, Peru. At home, Dalmo, the older brother, tries to control the passion he feels for his brother's wife. Anaíra, feeling abandoned, approaches Armando, the younger brother, and they have an affair. Dalberto's return puts all three men, now completely in love with the same woman, under the same roof.