Strange things are happening in the cemeteries of England. The corpses stored there change their positions, and eventually, some of the dead disappear. The local police are at a loss, and Scotland Yard is called in. The chief inspector assigns a young investigator to the case. However, he quickly realizes that his case is quite unusual, even downright mysterious. How do the bodies get out of the mortuary? Why are they all dressed? Why does the unknown perpetrator - a paranoid? - act according to a mathematical pattern? The investigation becomes increasingly confusing. A crime novel by the world-famous science fiction author Stanislaw Lem, firmly rooted in the English detective fiction tradition: In the end, the investigation will bring everything to light. What began so chaotically, with confusion, uncertainty, and ambiguity about the perpetrator and his motives.