The opera singer Sophia Sim onidis 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. They agree to dig around the tree and see if something has been buried there. They find nothing but soil.