Making his way into the women’s apartment, the maniac strangles them and drowns them in the bathtub. After a series of brutal murders, police captain Filin comes under suspicion. After all, it is known that all the murdered women had only one thing in common - each of them met with an opera. The only catch is that the detective did not kill anyone. Why would the mysterious sadist frame Owl? To save himself from prison and persecution of his colleagues, the opera is obliged to figure this out. The dangerous game has begun...