At the entrance of his mistress’s house, the head of the prosperous company “Alexer”, Alexander Serebryakov, was killed. It would seem that the case is clear and hopeless - a contract killing. But during the investigation, police captain Alexei Leonidov comes up with another version, stunning in its implausibility... Serebryakov’s case is closed, we can put an end to it. However, a series of new murders forces Alexey Leonidov to start his own investigation