Happiness is murdered when 11-year-old Lennard Grabbe goes missing in cold November Munich and is found 34 days later as a victim of homicide. Former commissioner Jakob Franck, already known from "The Nameless Day," delivers the most terrible news to the parents - happiness disappears. But the happiness of others connected to Lennard also ends abruptly or is murdered. While the special commission is at a standstill and the family struggles to cope with their loss, Franck buries himself in witness statements and reports until exhaustion, spending hours at the crime scene and employing his special technique of thought sensitivity - always hoping to uncover the "fossil," the one crucial factor that will solve the case. He is driven not only by the need to help the family.