According to an amazonian legend, every month, during the full moon, a brazilian fishing village receives a mysterious guest: the Dolphin, who transforms into a human to seduce and be loved by women and hated by men. One of her conquests is the daughter of a fisherman, who has a son with the Dolphin. He constantly reappears to seduce her, and even when she marries, he continues to look for her. This provokes the ire of the husband, who wants to kill him anyway.

Carlos Alberto Riccelli
as Boto

Cássia Kis
as Tereza

Ney Latorraca
as Rufino

Dira Paes
as Corina

Ruy Polanah
as Zé Amaro

Paulo Vinícius
as Luciano

Rolando Boldrin
as Contador de causo

Tonico Pereira
as Pereira

Sandro Solviatti
as Pescador

Marcos Palmeira
as Pescador