A man develops an attraction to the daughter of his father's fiancee.
Luigi, who is engaged to a rich bourgeois, Cinzia, meets his lovely cousin, Sonia, at the cremation of their grandmother. Six months later, Sonia moves in and enters his life, and gradually succeeds in seducing him. Sonia upsets his life. Now, Cinzia is jealous but he can not resist the seductress.
