The lives of three people intertwine when a professor from the Catholic University of Milan is assassinated.

Chief Inspector Alessandro Rossini finds himself forced to use all his skills to deal with the most difficult case of his career and at the same time put his restless private life in order.

Inspector Luca Bernardi, ex-raider of the Navy with a dark past, must not only help his friend in difficulty, but also deal with the demons that persecute him.

The young Nicholas, fearing to be an uncomfortable witness, must face the difficult compromise between fighting for his life and helping the police.

The truth will prove shocking, as well as the turn that the lives of the protagonists will take.