Due to the passing of actor Sergey Puskepalis, his character, Lieutenant Colonel Proskurin, is written out as having transferred to another city, though he remains a catalyst for the team's new official roles.
A crisis hits home when a colleague, Natalya, is kidnapped. Sonya hypothesizes that the murderer's identity is linked to beekeeping. The team races against time to locate their missing colleague and unmask the killer. Key Context for Season 4 Due to the passing of actor Sergey Puskepalis,
The investigation continues as the women delve deeper into the mystery surrounding the painting and the victim. They must navigate their new roles as official employees of the system, which often conflicts with their unconventional investigative methods. The team races against time to locate their
The stakes escalate as the team attempts to save a man named Maltsev, who is on the verge of suicide. Meanwhile, the police conduct a major raid at a waterfall as part of the ongoing case. The stakes escalate as the team attempts to
For the first time, Anna, Irina, Katerina, and Sonya work as an official analytical unit under the MIA, though they struggle with the bureaucracy and rules.