O Princípio do Prazer (1979)

Four siblings - two brothers and two sisters rent a farm in the city of Paraty. There, Otávio , Mário, Norma and Ana indulge in a life of leisure and incestuous sexual pleasures. Isolated from other people in the city, they relate to employees in an oppressive and threatening way. However, a greater mystery surrounds their lives and the arrival of Álvaro, a new employee will trigger fear and insecurity in the farm owners. And a strange mystery will be revealed and come to the knowledge of the inhabitants of the city. Trying to conquer him, his bosses offer him participation in their games of pleasure. Álvaro falls in love with Ana.