Oppressed by her husband, her lover, and her obsessive mother, a bourgeois woman is reunited with a childhood companion at the central train station in Milan. Throughout 24 hours there, she will experience her particular descent into hell.

A debauched nobleman offers himself to a beautiful woman, but she is repelled by his advances. He dons a mask and tries again, and this time is more successful. But the mask cannot conceal the evil in his soul.