The widow Elena Palumbo is the mother of two sons, Francesco and Paolo, who live with their mother on a farm they run. However, their land serves, for construction speculation, to Roberto De Michelis, willing to do anything to become its owner. After forbidding his daughter Angela to attend Paolo, whom she is in love with, De Michelis does not hesitate to have the latter killed, who in the meantime has enlisted in the Carabinieri and is on duty in Naples . Arriving to know the identity of the instigator of his brother's death, Francesco decides to avenge the death of Paul at all costs.