The head of a gang is seriously worried for his life. Since some time, horrifying things have been happening in his office—his secretary was killed, and a valuable disk has been stolen. Most likely, it’s connected to the transport of a mysterious cargo. The boss hires private detective Tatyana Ivanova, hoping she’ll track down the murderer. There are six people under suspicion, and the threat clearly comes from someone among his own. Tatyana builds theories, but all of them collapse: someone methodically shoots down the candidates for criminals. Tatyana is at a loss, the gang boss is in panic, and the number of suspects keeps shrinking…