João Fernandes

A man kills his wife on their wedding night, after discovering she had been unfaithful. After being acquitted, he moves to the country, where he becomes part of a love triangle.

Blum and Elza conduct Scientific and anthropological researches in a desert island, where they use as subjects a old fisherman, the house keeper and a prostitute from the country. But the affection grows between the three of them, and this feelings are capable of compromising the whole research.