Luigi is engaged to a rich bourgeois, but unexpectedly his cousin Sonia comes back to Italy. She is very young and beautiful and once she loved Luigi. What is he to do?

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.