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.

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.