The owner of a furniture factory, with the complicity of his lover, kills his wife by simulating a kidnapping. Marshal Rocca clashes with the victim's father who would like to pay the ransom. The man, after the discovery of his daughter's body, shoots his son-in-law killing him under the eyes of the marshal.

In the farmhouse of a former soldier, the skeleton of a soldier is found, killed because he wanted to report episodes of hazing. Another person responsible for the murder tries to drown his wife, at the time the victim's partner, who has discovered everything; Rocca saves her in extremis, but her husband takes the children of a nursery school hostage, also attended by Tommy, the marshal's adopted son. The courageous intervention of the child's natural father allows the criminal to be captured by the police.

A ruthless gang of Albanians kills the wife and daughter of Vinas, their compatriot and protected by the police. This takes revenge by killing himself, but also finding death. Cafiero, boss of the organisation, judging Rocca too dangerous for the clan, implements a plan to eliminate him: the car in which he was supposed to leave with Tommy and Margherita for their long-awaited honeymoon is blown up. Under the eyes of the marshal, who was saved only by chance together with his little son, his beloved wife dies.

After the depression following Margherita's death, marshal Rocca decides to put his uniform back on, with the intention of tracing the gang that murdered her; however, the anxiety of capturing them induces him to believe in false indications, which cost him his suspension from service. Determined to go it alone, he goes to Puglia, where the gang has a hideout, but Cacciapuoti alerts the police and the gang is routed. Rocca is seriously injured in the operation, but little Tommy will give him the strength to heal and, once reinstated in service, to receive a solemn commendation for the work done.