Divers are in the village pond male corpse in a dress and cut out on the chest with the word "whore." In the deceased they recognize the missing photographer. Investigator Kabanov sends Anya to interview witnesses. Mistress Krasnov reports that her lover was a regular visitor to BDSM parties. Hearing about this, Vorontsova goes to the club and learns that Krasnov came to a party with an aggressive and violent friend ...

At the river, teenagers find an unidentified corpse: the deduced word “whore” and a smiley face, like that of Krasnov, glow on his chest. In the case of the deceased photographer, there is new evidence: the investigators receive a tip-off on Andrei Livanov - he was the most aggressive friend who accompanied Boris Krasnov in the club. During the interrogation, Livanov is nervous, although there is no direct evidence against him, and the investigators still have one last hope - that the girl from the nightclub will recognize him.

Anya and Sergey are slowly moving towards solving mysterious crimes. In the village where one of the victims was found, they are looking for someone who could use the boat to throw the body deep into the pond. Log entries bring them to the lodge of a local hunter. While there is no owner, Anya begins to inspect his dwelling and discovers photographs on the wall in the shed. On the part of the pictures - the dead at the hands of an unknown murderer. Away hanging photo Kovalevsky - the rich man from the Forbes list. It turns out that a businessman and his wife went to the club by car and disappeared ...

After interviewing all the workers of the camp site, it turns out that security guard Stanislav Gurenko spoke with Migunov who drowned last year. In the village where Migunova’s sister lives, Vorontsova is brought up by Kabanov and asks meticulously not to interview a witness. During a conversation with Migunova, a dog runs into the room - the same guard dog who disappeared from the tourist center. At this point, there is no partner around, and Anya tries to quickly get out of the house herself, but becomes a prisoner of Gurenko hiding there ...

After the photographer’s case is closed, Anya returns to the district ATS to the hated deputy head, and Sergey goes on vacation with his family. But the photo with Kovalevsky does not give him peace, and he convinces Anya to meet the millionaire. The conversation does not give anything: he does not know the people in the picture and claims that neither he nor his wife have any relation to the Karelian city. At the institute where Kovalevskaya studied, investigators find her documents. It turns out that a woman is from Kondopoga, but there is no more information about it anywhere else ...

After the death of Irina, Vorontsova returns to the head office and resumes work on the case. Anya once again rechecks all the evidence, but none of the friends of the victims have ever mentioned Kondopoga, as if she had never been. Detectives find out that after he left prison, Gurenko repeatedly visited his cellmate and mentor Boretsky, a native of Kondopoga, who is no longer alive. The photo album in which they found the pictures belonged to him, and the unknown girl depicted in one of the photographs is the eldest daughter of Boretsky. In the early nineties, her body was found with a smile and the word "whore" cut out on her chest ...

Anya with Sergey goes to Kondopoga. They hardly find any materials on the “lake maniac” that was operating here in the 90s: a lot of documents were destroyed at the police station due to a fire in the 95th. Surveys of relatives and friends of the girls draw a similar picture: shortly before the death of the victims, they got a good job, got models and were about to leave. Then their bodies were caught in the river. Sergei finds out that the selection involved the agency Livanova, which in fact was a real brothel with an influential "roof".

Investigators are sent to a mental hospital to interrogate a patient who was accused of serial murders. He actually confesses everything and claims that the girls "asked him themselves." A man in the clinic was regularly visited by his brother Victor, a former gangster, and now a respected businessman. Detectives learn that two months ago he disappeared somewhere. The merchant's wife refuses to speak with guests from the chapter, but when she sees the photo, she admits that there is a similar picture in their family album, and one of those present in the photo is her husband.

Kabanov and Vorontsova finish the investigation in Kondopoga and return to St. Petersburg. The boss is pleased with them, but insists on closing the case: once a maniac is in a hospital, further ones are useless. But investigators believe that they must continue, because the murderer of Livanova has not yet been found. The partners are sure: Kovalevsky himself dealt with it.

After a thorough study of the evidence from the scene of Livanov’s death, investigators seek to obtain a search warrant for Kovalevsky’s house. In the trunk of a businessman find the earring killed. The millionaire is under arrest, his belongings are confiscated. In the safe Kovalevsky find the flash drive, and Anya takes it to study ...

Kovalevsky is afraid that everyone will know about the contents of his flash drive. He invites Vorontsov to a meeting and promises a generous reward in exchange for the thing that the investigator took. Anna does not hesitate to refuse, and then Kovalevsky threatens her with terrible reprisals ...