Styx

In Styx, investigator Mukaev is found severely beaten and suffering from amnesia. As he returns to work, he discovers he was previously pursuing a serial killer before his attack. With only he having detailed knowledge of the case, he resumes the investigation, uncovering a dangerous truth.

As Mukaev delves deeper, he learns that all the victims were once his mistresses. This revelation complicates his search as he realizes someone is framing him by planting incriminating evidence. The atmosphere within the investigation team grows increasingly tense, and Mukaev finds himself at the center of suspicion, forced to confront his past and the danger it presents.