Martin wakes up with Mironov after a doctor cleans his wound. Mironov tells him how during an operation they shot all the criminals and Jaro offered to steal the money, but Mironov refused and was shot. He later woke up and set fire to everything around him, faking his death. After leaving for Russia, he married, but Jaro discovered him and killed his wife. Now he's back for revenge and wants Martin's help. He, in turn, returns to Jaro and continues his work undercover. Popov asks Martin at the hospital to stop everything, and at the same time Nikolov comes to question him, but Popov says he doesn't remember anything and reminds him that he knows who he is. Ivo lies to Jaro that he killed Sunny. Meanwhile, Jaro decides to change tactics and build a good image among the public, and Martin manages to get more information from a politician close to Jaro and passes it on to Mironov. When Mironov uses the information against Jaro, he suspects a politician and kills him.

One of Djaro's bodyguards, Geletto, is caught selling drugs behind his back, but his friend breaks him out of jail right away. Meanwhile, Ivo helps Jaro by exposing some of his colleagues to the police to make him look good. Later, Ivo and Djaro catch Geletto in a lie about the cocaine theft. Martin follows Ivo, but he catches him and then asks Sunny about everything that happened and if Martin is a police officer, but she doesn't answer. Popov decides to go back to work, but Martin doesn't seem particularly interested, because of Mironov's help and protection. Jaro becomes suspicious of both Martin and Geletto because of his quick escape from prison, and puts them to the test. Geletto, frightened, decides to escape, but ends up being killed by the twins on Djaro's orders.

Unpaid debts and rage The dangerous game of the undercover agent - Martin Hristov continues. In the name of his mission, he will "step" into risky criminal acts. Jaro is furious because someone stole something from him and someone else forgot to pay back their debts. What actions will he take in his rage and what will happen to the people it targets? More about the bandit's past during his years in the police and what will happen in the newly formed triangle: Martin - Sunny - Ivo.

The drug market under double siege Undercover policeman Martin and Zdravko-Kosama have to deliver a ton of benzyl methyl ketone (BMK) - an ingredient used in the production of amphetamines. However, the two are deceived by the dealers who supply them with another substance. At the same time, the police set a trap for them and Jaro's employees are taken into custody, from where they are surprisingly released. It turns out that instead of the BMK ingredient, the dealers sold them epoxy resin, which is a substitute. Martin and Kosama's task is to find the crooks and return the goods, without which Jaro's big deal with amphetamines fails. In the meantime, the police are preparing an action against the person whose property is the workshop producing the illegal ingredient. Will Martin and Zdravko be able to outrun the police and correct their mistake in time? All they can do is fight back.

New traces of the past Ivaylo Hristov and Chocho Popjordanov go "undercover" Martin's mission continues. This time Jaro will ask him to rob the house of a rich collector and steal a golden rhyton from him. Since the house heist is extremely difficult, Martin will work with a new partner who happens to be his own father! Ivo, in turn, launders a large amount of money, but Jaro is not satisfied with the commission and the two come into conflict. Meanwhile, new evidence concerning the murder of MP Boris Zhelev arrives at the GDBOP, and a new very powerful player is involved in the investigation - Momchil Neshev (Chocho Popyordanov). How will Martin keep his cover with his father's appearance? Will Deyan Donkov's character survive and what will be Djaro's new business?

Ivo and Kukata decide to rob a tow truck behind Jaro's back. Meanwhile, in GDBOP, Vasil's department is headed by Momchil Neshev. Neshev interrogates a suspect and uncovers important clues surrounding the murder of MP Zhelev. Unwittingly, Hook reveals details of the collection hit to Martin. To take revenge on Ivo, Martin gives Inspector Popov information about the upcoming robbery, and so Ivo and Hook fall into a trap, and their lives are in danger.

A saved report on counterfeit money Popov understands that the "Secret Service" is expecting a big deal with counterfeit money, in which Jaro will also participate. Meanwhile, Jaro entrusts the same deal to Martin, and Ivo is humiliated by the collection hit. Hook is relieved that Ivo didn't turn him in to Jaro for his part in the heist. Martin does not report the counterfeit money to Popov, but when he makes the transaction, the inspector intervenes and sabotages it. Hook and the twins narrowly escape. And Martin has to explain why he lied to his mentor.

An Ancient Find, Kidnapping and Escape Plan An ancient tomb was discovered along the route of the border road built by Djaro. Before journalists knew about the find, the case urgently needed to be covered. To this end, Boyana bribes the official in charge of the archaeological finds, but is surprisingly kidnapped by strangers along with the permission to continue construction. This calls the whole project into question. Popov learns from Martin about the kidnapping and the police joins the search. Meanwhile, Sunny asks Martin to get her out of the secret apartment where she is hiding with Ivo's mother. The two make a plan to escape, but just as Sunny prepares to escape, Ivo comes home.

Djaro's lawyer - Boyana accidentally finds out that his former lover Sunny is alive. Meanwhile, his accountant informs him that someone has been misappropriating funds from his illegal transactions. After Boyana shares her discovery with Jaro, he guesses that Ivo ignored his order to kill Sunny, and the fact that he has been embezzling money from his illegal business also comes to light. Jaro goes berserk and sets a trap for Ivo. At this time, Sunny and Martin separate, not knowing that they are in danger. Popov describes the witness protection program to Sunny and questions her about Djaro's business. At first she is scared and hesitant to testify against the boss, but she finally agrees and the deadly game begins.

The conflict between Djaro and Ivo becomes even more acute when Ivo and Hook appropriate parts of Djaro's drug market. Meanwhile, Djaro announces Martin as Ivo's new deputy. For his part, Mironov asks Ana Nedelcheva to disclose information about Djaro and his project with the road to the Greek border. In the GDBOP, Popov and Neshev reveal new clues about the murder of MP Boris Zhelev. Stung by Ivo and Hook, the drug lord Meto contacts Djaro and tells him about a meeting of the bosses organized by Ivo. Although Djaro promises General Penev not to frame Ivo, the boss goes to the meeting to settle scores with his former right-hand man. Who will survive this dangerous game?

Martin reported to Popov about Djaro's plans to make a counterfeit money deal and leave the country. The agent is desperate as he has been put on a national manhunt and Popov is powerless to help him. The undercover cop knows that without direct evidence they can't arrest Jaro and he will get away. Before the cops hit Jaro's printer, Martin steals a disk with files on the counterfeit notes from her. Meanwhile, Hook is worried that mass arrests have begun and wants to cover temporarily. Djaro finds out that his printing shop is closed and threatens Popov's family. At this time, Martin slips the disk from the print shop into Djaro's apartment. Popov and Neshev searched the boss's apartment and arrested him on charges of counterfeiting money.