The young widow Arianna has recently married to a businessman Aurelio. She brings her children, Carlotta and Gustavo to the new family. Carlotta has a relationship with Henry, but is attracted by the new stepfather and seduces him. Gustavo, however, prefer a gay relationship with Mario. At this point Arianna decides to introduce her son the taste of a woman by herself and does the same to Mario in front of his son. Of the whole situation took advantage of two young blackmailers: Mario and Enrico.