How do you solve a murder without a body? Keeping watch under the windows of the Paris flat belonging to a politician\"s nephew, ex-special investigator Louis Kehlweiler catches sight of something odd on the pavement. A tiny piece of bone. Human bone, in fact. When Kehlweiler takes his find to the nearest police station, he faces ridicule....

The opera singer Sophia Simeonidis wakes up one morning to discover that a tree has appeared overnight in the garden of her Paris house. Intrigued and unnerved, she turns to her neighbours: Vandoosler, an ex-cop, and three impecunious historians, Mathias, Marc and Lucien - the three evangelists....