The life of a successful business lady is in danger. The head of the detective agency, Grigory Gonymar, confidentially undertakes to unravel this case. The detective is faced with a series of unexplained murders. Villains are self-confident: some of them act secretly and hide behind a mask of integrity, others are unceremonious and cynical in their actions. Figuring out which of them is the killer is not so easy. But the detective confidently follows the trail...