A building contractor is found dead on his construction site. The carabinieri's suspicions focus on those responsible for "Casa Domani", a center for dyslexic children, which was about to be evicted by the builder. But mysterious events that occurred on the night of the crime and the discovery of the body of a man with no identity reopen the games. Don Matteo and the carabinieri discover the key to solving the mystery in the collapse of a building that occurred years earlier: a mystery in which chance played its part...
