Daniel, son of an important businessman, discovers a strong incestuous desire for his mother after a car accident in which his father dies. Feeling guilty about his father's death, he seeks refuge in the special affection and attraction he feels for his mother.

The novelist Alcides and the Countess Gamiani fall madly in love with Fanny. During a party they make love together and, out of jealousy for her, the countess poisons the girl.