Barbara Florian is in love with Renalto Baldini. After the latter goes off to a distant job to make enough money to marry her, the girl discovers she is going to have a baby. Marco (Otello Toso), posing as a friend, exploits the situation to his own gain, and uses the situation to shock the girl's ailing father to his death. Marco then marries the widow, Valeria (Franca Marzi), the girl's stepmother.