The corpse of an employee of the funeral home Oleg Yudin with a sewn-up mouth was found. A certain Martynov, the owner of a private morgue, falls into the circle of suspects. Under pressure from the investigation, he admits that, while receiving money from hospitals, he did not cremate the deceased, but buried them in a landfill near his crematorium. But who could benefit from having access to so many unaccounted corpses? It turns out that many of the dead who were discovered were involved in contract killings, and remained unsolved. Investigators meet with Martynov's brother, business consultant Troyanovsky, who taught Martynov the art of management, and find out who was behind the chain of mysterious deaths ...

Sisters Olga and Svetlana Martynovs quarrel over the conditions of the funeral of their deceased mother Polina - Olga insists on the funeral of her mother with her beloved ring, and Svetlana wants to carry out cremation according to the agreement drawn up by Polina shortly before her death. However, the ring disappeared without a trace, and Polina was cremated. Soon Olga is found dead, and the examination establishes that the cause of death is a drug overdose. After interrogating Svetlana, investigators learn that the ring was very valuable. The deceased Olga suspected the previously convicted groom of her sister Khromov, but he turns out to be not involved in either the theft of the ring or the murder, but someone clearly wants to set him up ...

The investigators track a double-crossing "Bonnie and Clyde" couple whose nine bloody victims include two undercover police investigating an illegal gun-running ring. To gain a foothold on slim evidence, Loginov focuses on the mental processes of one suspect - and he knows that his female companion pulls the strings.

The famous cardiac surgeon Leonid Feldman was shot dead in a restaurant toilet. Suspicion falls on the ex-wife of the murdered Veronica, who accused him of harassing their young daughter Sonya, and then on Veronica's sister Serafima Linkova. However, Sonya denies the accusations against her father. Upon learning of this, Seraphima leads the investigation to the real killer ...

A student of the architectural institute was killed on the square of the Leningradsky railway station. The attention of investigators is attracted by a famous architect, whose work was fond of the murdered. It turns out that the architect is married to three women at once, one of whom is pregnant, and the student is the architect's illegitimate son ...

Two men were killed - Ivan Kirillov, who was wanted in the case of a large embezzlement of depositors' money, and his own son Leonid ...

Businessman Mikhail Solodovnik was killed. All members of his family are under suspicion. Petrovskaya and Loginov inspect the apartment of his ex-wife and discover potent drugs ...

A young woman, a reporter for a popular newspaper, was killed. Both her lovers are under suspicion: a journalist of the same publication, who stole other people's articles, and the head of the newspaper, who exposed this fraud.

One after another, two girls become victims of a maniac who tried to perform a lobotomy operation on them.

Antiques expert Rita Titova was found strangled in the park. Investigators establish that on the eve of her death, Rita met with the customer for the examination of silver spoons.

A young scientist dies of an overdose of a heart drug added to his coffee. Investigators go down the wrong path until they find out that shortly before his death, a scientist proved the fallacy of the scientific theory of a famous professor.

The murder of a veterinar woman is being investigated for suspecting that her client's horse is being used to transport heroin ...

In the midst of a trading day, a young Chinese woman, Annie Denisova, was killed at the market. From a conversation with her husband, Loginov and Petrovskaya learned that in early childhood, in front of Annie's eyes, her father was brutally murdered. And witnesses in the market told investigators that before she died, the girl noticed someone and even chased after this person. A version appears that Annie recognized the murderer ... All the threads lead to the house where the Chinese Shu, who is engaged in the manufacture of fake certificates for the import of art objects from China, rents a room ...

Juvenile inspector Marina Levchik was killed. To unravel this case, Loginov and Petrovskaya will have to sort out Marina's complicated ritual relations with her gypsy relatives. It turns out that Levchik was categorically against the involvement of young Glasha, the daughter of her niece Lily, in fortune-telling fraud and theft. But the gypsy baron, Marina's brother, demanded not to interfere in the affairs of the family ...

During a speech on the radio, the president of the charitable foundation Nikolai Kupriyanov learns about the abduction of his mother Galina and daughter Tamara. After consulting with his brother, he decides to pay the ransom. True, Nikolai also does not refuse to contact the police. The investigation is suspicious of the criminals' detailed awareness of the fund's financial situation and the schedule of meetings of its employees. Loginov and Petrovskaya come to the conclusion that the organizer of the abduction is closely connected with someone from the Kupriyanov family.

Nursing home employee Irina Golenkova was found with her throat cut in her bathroom. Her husband does not inspire confidence in the investigators, because, according to the acquaintances of the murdered woman, her husband often raised his hand against her. Suddenly, stories of mysterious murders related to the Golenkov family begin to surface. Under mysterious circumstances, the driver of the nursing home, the son-in-law of one of the patients, Irina's colleague, died ... All these cases are united by one circumstance, which becomes the main clue: the killer is left-handed.

Theatrical institute student Tatyana Smirnova was killed, and her fellow student Nikita Rodin, who accompanied her home on the day of the murder, was seriously wounded. Loginov and Petrovskaya interrogate the young man and find out that on the eve of the tragedy Nikita was going to propose to Tatyana and was examining the wedding ring in a bar near their institute in front of two teenagers. Going out on the trail of the suspects, the investigators find the stolen ring and Tanya's handbag, but the teenagers deny everything and describe the attacker in detail.

Under mysterious circumstances, the popular radio host Semyon Bessonov disappears. From a conversation with colleagues and relatives, Loginov and Petrovskaya learn about the severe depression in which Bessonov was. His condition was aggravated by the impending dismissal. The confession of his wife did not make it easier for the investigators. It turns out that Semyon has already made an attempt to commit suicide.

Militiamen leave on an emergency call - robbery of the post office. When trying to detain, the robber explodes right in front of the guards. Loginov and Petrovskaya arrive at the scene. They are sure that the deceased Eduard Dorokhov had an accomplice who watched everything from the sidelines and had to turn off the timer upon successful completion of the operation. But finding out who could have forced Edward to do this dangerous business is not so easy.

Valery Zaborin's body was found in the courtyard of an abandoned house. It turns out that on the eve of his wife Anna turned to the police with a statement about the disappearance of her husband. Shortly before the incident, the couple quarreled, and Anna moved to live with relatives. Valery was last seen leaving the bar. The investigation reveals curious facts from the biography of the newly-made widow, but can they serve as evidence of her involvement in the death of her husband?

Liza Roslyakova was taken to hospital with severe chemical poisoning. The doctors were powerless, and a day later she died. The examination showed that the girl was poisoned with a chlorine-containing poison. Loginov and Petrovskaya, starting an investigation, learn about a mysterious man with whom Lisa had frivolous correspondence on the Internet. They learned from relatives that the mysterious addressee not only addicted Lisa to cocaine, but also supplied her with drugs by mail.

Young journalist Nikolai Klimov was found in his own car with his throat cut. A ritual cross was found next to his body, and when inspecting the workplace, a leaflet with the address of the house near which his car was parked was found. By all indications, this murder resembles a sacrifice, and all traces lead to a popular sect.

Despite the witness protection program, someone cracked down on the Borisov couple. Denis's husband badly damaged the Tambov criminal group by testifying in court about their financial machinations. During a search in the apartment of the murdered, Loginov found a fragment of a photograph of an unknown man. It seems to investigators that the bandits have nothing to do with it. Raya, the daughter of the Borisovs, unexpectedly sheds light on this complex matter.

The teenager Sasha dies in a car accident, and his mother Nina Tsareva and three younger brothers are hospitalized. Loginov and Petrovskaya interview witnesses to the incident and establish that the cause of the accident was a technical malfunction. However, the man who accidentally saved Tsareva and her sons insists on his version, according to which Nina herself wanted to commit suicide and kill her children.