About the book: 1990 / An old man is killed in a city park. The killer was caught at the scene of the crime, and it seems that the case can be closed. However, the suicide of the criminal and the strange cipher note found on the body of the old man give reason to assume that the case is much more complicated and confusing than it seems... The investigation of the murder is entrusted to the senior detective of the criminal investigation department, Captain Kondrashov.