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
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. A crisis hits home when a colleague, Natalya, is kidnapped
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. Key Context for Season 4 For the first
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. Due to the passing of actor Sergey Puskepalis,
While traveling to the airport, the team receives a mysterious envelope containing a seascape painting. Using their expert decoding skills, they discover coordinates hidden within the artwork. Upon arriving at the designated location—a local landmark—they discover a body.