Surgeon Camilla Masiero is found dead in her home, intoxicated by gas. Suicide is suspected, but Stucky, reconstructing the dynamics from the woman's last day of work, discovers some crucial truths.

Fabio Berrin's death appears to be a case of anaphylactic shock, but the autopsy reveals the presence of pesticide in his body. The Clues point to the husband of his last lover, but Stucky senses a deeper truth.

In an abandoned warehouse, two drug addicts are found dead along with a bag containing diamonds stolen from a well-known jewelry store. Stucky, doubtful of the dynamics, investigates starting with the ownership of the jewelry store.

Giovanna Bastoni, a lawyer, is killed. It looks like a robbery, but Stucky suspects something else. The clues point to a trainee, the victim's alleged lover, but the death of a forger will reveal the real culprit.

Giorgio Sartor, a confectionery entrepreneur, dies during a hunting session: but suspicions fall on his wife Kristina and her ex-husband Petrov. Stucky, however, senses that it is a red herring

Malik, a young immigrant, is found dead under his house. It seems like a suicide, but Stucky suspects it was a murder and investigates the Zanons, a family linked to the boy.