Nino Santorio, a travelling salesman for a shoe company, married to Anna, during one of his working trips gets to know the lovely wealthy Barbara Chierici. He falls in love and runs away with her, abandoning his wife. Seven years later Nino, with Ciro Ramaglia, an actor and singer who has never made it, finds work as a house servant in the villa of Aristide Iannotti, an engineer, who lives at Amalfi. Here Nino gets to know a little girl called Antonella, aged seven. The engineer's wife is none other than Anna, the woman he left seven years before. Anna, in order to make Nino suffer tells him that Antonella is really his own daughter. Upset and tired by the humiliations inflicted on him by his ex-wife, Nino decides to leave for Milan. Meanwhile, Antonella, having learned the truth, has her mother accompany her to the station. Here she looks for Nino and while Anna looks on horrified, she runs up to him shouting "Papà".