Palmieri, a rich engineer, lives on an estate run to his satisfaction by Gaetano, his steward, assisted by his son Vanni. The latter seems to be a serious young man but he in fact has ulterior motives: he plans to kidnap Patrizia, Palmieri's daughter. And not only that, he also decides to be 'kidnapped' himself (by two accomplices) for another ransom, from his own father this time. But police inspector Matecari is on his trail.