Andrei Rubetsky comes to Valeria's ex-wife to pick up his things. Music is playing in the bedroom and candles are lit, and the ex-wife is lying on the bed, with a noose around her neck ... According to the marriage contract, Andrei cannot claim the deceased's apartment, but he gets part of the money from her bank account - quite a decent amount for an unemployed artist ... In addition to this, Andrey has no alibi.

While walking in the schoolyard, a 9-year-old girl was shot to death by her classmate. The teacher caught the little killer when he tried to throw the pistol into the trash can. The boy's parents are law-abiding citizens; there were never any weapons in their house. Where did the child get the gun from? Investigators questioned everyone at the school, but to no avail. The killer boy himself flatly refuses to tell where he got this dangerous "toy".

In the middle of the night, an old woman with Alzheimer's disease enters someone else's apartment. She claims that this is her apartment and tells everyone about a certain Lyuba. Having found burn marks on her grandmother's body from cigarette butts and ropes with which she was tied, investigators believe that she was raped. However, this hypothesis is not confirmed. Bobrova and Pankratov establish the identity of the grandmother. This is Nina Glebova, who often visited the apartment as a child, where she was found. Nina's son Nikolai, who leads an asocial lifestyle, falls under suspicion. It turns out that he deliberately took the mother out of the nursing home in order to receive her increased pension. On the eve of Nina's discovery in the apartment, Nikolai's house was having a drinking binge. After interviewing the guests of the party, Bobrova and Pankratov go out to Nina's grandson Sasha and his friend Zhora, who works in the nursing home where Nina used to live.

A man with a gunshot wound was found near the gay club. There are traces of rape on the body. But the victim is in no hurry to help the investigators, as he is afraid for the fate of his sick daughter. All that becomes known is the occupation of the victim himself and his wife. They both take part in the filming of porn films to earn money for the treatment of the child.

A two-year-old girl, Katya, walking under the supervision of a young nanny Irina, disappears from the playground. The police suspect that a wanted pedophile is involved in the kidnapping of the baby. But soon Pankratov discovers the girl unconscious in the bushes near the site. Doctors show no signs of rape, but Katya will have a serious operation. Irina claims that she did not allow strangers to approach the child. However, another witness to the incident, an experienced nanny Anna Vladimirovna, reports that she saw a suspicious man with a camera not far from the site. Near the site, investigators find a box of photographic film and with its help go to the photographer, who followed another nanny and ordered by one of the parents to check her reliability. The pictures constantly confirm Irina's alibi. After the operation, the doctors diagnosed Katya with a disappointing diagnosis: bilateral brain contusion with retinal detachment caused by concussion infantile syndrome.

A bloody corpse of a woman was found in the park. A person who has already served time for similar crimes will fall under suspicion. The murder could also be related to the professional activities of the deceased. However, subsequent events force investigators to take a closer look at the victim's inconsolable spouse.

In the lobby of the hotel, student Maxim Cherkasov was found unconscious with a head injury. He claims that he met a girl in a bar, and when they came to the room, she attacked him. Investigators establish that Maxim works for the Escort Services agency. Bobrova and Pankratov find a victim of a similar attack, which helps them compose a composite of the suspect. Viktor Krymov is soon attacked. Having studied the circle of acquaintances of Krymov, Pankratov and Bobrova establish that Viktor constantly provided intimate services to Lyudmila Dadkovskaya, the wife of a major banker Igor Dadkovsky. However, the suspicions against Dadkovsky are not confirmed, and the investigation turns to Ryklina for help, who, accepting the next order, gives the address of the meeting place of her employee with the mysterious woman.

The ten-year-old adopted son of the famous singer Elza Parshina Misha dies under the wheels of a car. Misha's governess and Irina's producer unanimously blame the boy's death on his computer science teacher Sergei Byazirev, who allegedly attempted to sexually harass Misha. The investigation finds Byazirev, who makes a shocking confession that he is Misha's father and has been looking for his son for many years. The expert examination confirms Byazirev's words, and all suspicions are removed from him. Investigating the circumstances of Byazirev's visits to the Parshin's house, Bobrova meets Misha's sister Masha and notices the girl's traces of physical trauma. Bobrova believes that Masha's parents severely punish, however, a conversation with the girl's teachers convinces her otherwise.

Olga Bobrova is asked for help by her former work colleague, Lieutenant Colonel Anton Yakovlev, with whom she had an affair in her youth. Together they are looking for two criminals who escaped from the colony - the rapist Mikhail Golovin and the murderer Goshu Chobu. The investigation establishes that Golovin, convicted several years ago for the rape of his own stepson Alexei Kharitonov, may threaten him, as well as his mother Klara and their common son Danila. Bobrova and Yakovlev talk with Golovin's mother Zinaida Petrovna, but she does not admit where her son is hiding. Investigators detain Gosha, who says that he and Golovin managed to bribe the guard. Only after the mysterious disappearance of Alexei and the confession of Gosha, Zinaida Petrovna reports that she herself organized and paid for the escape of her son and gives Bobrova his address. Bobrova goes to Golovin's apartment, where he keeps Alexei, and also becomes his hostage.

A teenager with extraordinary cruelty kills two high school students, and tries to commit suicide. He committed a crime under the influence of a psychotropic drug, but this does not exempt him from criminal liability. It turns out that high school students not only mocked the teenager, but also raped the girl he was in love with.

The murder of a newborn baby and his mother is being investigated. To cover up his tracks and prove his innocence, the suspected doctor Pestov, who is also the father of the murdered child, donates someone else's blood for analysis. The examination establishes that the blood belongs to a pedophile, who is credited with a series of brutal rapes.

A girl who was a victim of rape was taken to the hospital. But the interrogation was not destined to take place: an unknown criminal beat the law enforcement officers, kidnapped and killed the unfortunate woman ...

The Rescue Service receives an alarm call from a girl who begs to prevent the murder. Bobrova and Pankratov, who started the investigation, learn that the caller, Alena Erokhina, disappeared from the house without a trace. At the place of work they said that she was on maternity leave. Alena's former roommate Maxim Shcheglov and her sister Larisa fall under suspicion. But the young man did not know anything about the pregnancy of his girlfriend, and Larisa, despite constant quarrels with her sister, would hardly have decided on a crime.

The mother of Katya, who suffers from Down syndrome, turned to Pankratov for help. The thing is that her daughter is pregnant, and the parent demands to find the rapist, because she is sure that Katya, of her own free will, could not have an intimate relationship with anyone. Three of them fall into the circle of suspects - the driver Roman, the director of the rehabilitation center Mitrofanov and the girl's lover, a pupil of the center Oleg. But genetic examination rejects all these versions.

Successful businessman Yevgeny Chashchin was found dead in his apartment. According to the concierge, Chashchin had his common-law wife Veronica and a son from his first marriage, Peter, that day. It is also known that the day before he had a quarrel with his wife in front of the administration of the kindergarten, where the couple came for their daughter Zhanna. After interviewing Chashchin's neighbors and acquaintances, Pankratov and Bobrova find out that Veronica got along with Chashchin only because of his financial situation, and she herself seduced his young son.

Arriving at the celebration of the engagement of Leonid Grigoriev and Irina Saiko, the invited Potapovs found the groom, the bride and their friends - Viktor Zhukov and the girl - killed. Bobrova and Pankratov were struck by the cynicism of the crime: an unknown person forced Zhukov to rape the bride, and the groom forced Zhukov's girlfriend, after which he stole jewelry and family photographs. Bobrova and Pankratov are developing a version of their personal hostility to the Grigoriev family, but a similar crime that happened indicates that a serial maniac has appeared in the city.

Sixteen-year-old schoolgirl Masha Kolobova was found dead on the street. The forensic medical examination establishes that shortly before her death, the deceased had sexual contact. The keys to the unknown premises were found with the girl. The mother of the murdered woman claims that her daughter was an exemplary student and studied in a theater studio. The head of the studio, Stanislav, who had previously been seen in dubious ties with his students, falls under suspicion.

Katya Alekseeva, handcuffed and with a plastic bag on her head, was found by her sister Lena. The girl was saved, but she refuses to name the attacker. According to the investigators' calculations, the unknown spent about an hour in her apartment, and an examination of the premises shows that there was another woman with Katya. The case is complicated by the fact that the victim claims that she was raped.

Investigators find out that for about a year, Tatyana Polyakova, who has been in a coma, is suddenly transferred from a rehabilitation center to a hospital with suspected pneumonia, where during the examination it turns out that she was raped and is now expecting a baby. Tatyana's parents are sure: the culprit of what happened is her young man Dima. But genetic examination removes suspicions from him and from some of the center's employees. Suddenly, by order of the neuropathologist Minkov, Tatyana is transferred back to rehabilitation, where the gynecologist is ready to have an abortion for her.

The body of a graduate student of the Faculty of Law Evgenia Voronkova was found in the park. The girl was strangled, and the crime scene was fenced off with a special tape used by the investigating authorities. The killer left no other traces. From a conversation with a classmate of the deceased, the investigators learn that they helped each other to collect materials for dissertations and often met with the general scientific adviser, Professor Kryuchkov.

Young single mother Valentina has lost her youngest son Zhenya. Investigators find out that the mother forbade the boy to see his father. Soon, an unknown person attacks the cook and director of the pizzeria, where Valentina and Zhenya often visited. In the backroom of the establishment, photographs of a boy with a strange signature were found: "Shura".

The mother of 16-year-old Nadezhda Rusakova announces the rape of her daughter. The girl is constantly confused in the testimony and can not give an accurate description of the attacker, nor indicate the place of the incident. The only clue of the investigation is the rapist's nickname - Yachtsman. The girl's Internet correspondence with him should also help.

18-year-old fashion model Ilona Shirokova was found beaten and raped at the entrance to the hospital. In addition to serious injuries, doctors diagnosed a critical content of amphetamine in her blood. It is known that the day before, the victim took part in a photo session organized by a modeling agency. But Ilona was kicked out of the shooting, accusing her of being overweight. Model Nadine Pavlikova left with her that day. Her second girl's body was found near a nightclub.

The body of a young assistant to the district prosecutor Lyubov Volodina was found in the park. A member of the Sedykh investigation team, assistant prosecutor Svetlana Shchukina, takes this tragedy as a personal one, because Lyuba was her friend. Shchukina recalls meeting her in a cafe and spotting a suspicious man watching them. Investigators interrogate workers doing repairs in the park, and they identify several of the rapists at the police base from the photos.