The secret cipher

Alice (under the guise of Anna) is taking revenge for her father, an honest policeman who was killed in 1985 for trying to uncover corruption in the ranks of the police.

She plays a dual role. The first role is a criminal who tried to annoy detectives and people by collaborating with Victor. The second is that she conducts a secretive investigation, leaves messages saying "The truth always comes out" and cooperates with detectives Maxim and Elena. Igor Stepanovich, her father's former colleague, begins to blackmail her: he knew about the impending murder, but did not intervene in order to preserve the system.

Investigator Maxim suspects Alice at first, but then understands her motives and joins her. Analyst Elena also joins the team.