A series of strange murders has frightened residents of a sleepy residential area. Mystical signs carved into the skin and intricate knots that bind the flesh of the victims offer two ways to solve the riddle. One of them leads to a club for lovers of the Japanese erotic art of bondage, the other leads to the country residence of followers of a dark cult. Investigator Smirnov and investigator Kazimov will have to choose the right path, find and neutralize the killer. However, will they be able to cope with their own demons?...