[1][2] Police officer Carlo Vinciguerra is investigating a drug trafficking cartel.
In order to infiltrate it, he pretends to be the drug-addicted nephew of an acquaintance of Rosanna Clerici, and arrests her for possession during a party at her house.
Carlo ends up having to host the boy until the judge decides about his mother's request for house arrest.
In particular, his clandestine relationship with a married colleague from work is put under severe stress.
She accepts his tutelage of her son only out of fear of retaliation by the criminal circle with which she was still in touch.