A year ago, millionaire Oleg Filatov lost his wife and best friend. After this tragedy, he retired from big business and now leads a quiet life, running his own bookstore and trying to build relationships with loved ones. But the past does not want to let him go. Investigator Ulyana Sokolova is still trying to prove that Filatov staged lynching by cracking down on his wife's killer. The conflict between Filatov and Sokolova flares up with renewed vigor when a man becomes an involuntary witness to the death of a young student in the subway. Sokolova is sure that the girl was killed, and Filatov is the main suspect. Soon comes the information from the medical examiner. The cause of death puts the investigation into a dead end. According to the expert opinion, the girl who fell under the subway train drowned ...