Due to difficult life circumstances, successful Moscow psychotherapist and profiler Aleksandra Meshcheryakova is forced to return to her hometown of Kalinov. Unable to continue working in her profession, she takes a job as a cleaner at the Investigative Committee. With an intimate understanding of the human psyche and subconscious, she can't remain silent when she overhears the investigators' discussions. With her many years of professional experience and challenging personality, Aleksandra begins to actively participate in investigations. But she doesn't yet know that she will not only analyze the personalities and motives of criminals but also find true love.