After celebrating his 35th birthday, time for Andrey begins to go in the opposite direction: every new day is the previous one for him. In order to return to the real flow of time, Andrey needs to correct the mistakes he made in the past.
1978. Cherkasov's group begins a new investigation: a young gamer Kira Miller and her lover Colonel Potapenko were killed at a dacha near Moscow. It turns out that shortly before her death, Kira lost 400 thousand rubles in a katrana - an underground casino. To find out all the circumstances of the case, Major Cherkasov decides to send Sonya Timofeeva to the katran. At the casino, Sonya meets Boris, nicknamed the Musician, who works there as a pianist. They have a whirlwind romance. But one day, in front of Sonya, Boris commits a crime. Realizing that she is in danger, he looks for a way to save her.
The year is 1953. Due to the mass amnesty, the criminal situation in the USSR is tense. At the same time, Ivan Astafyev, a former commander of a reconnaissance platoon, who was released from prison, returns to his hometown of Gorky. And immediately becomes a victim of an attack by bandits, and then a false accusation of beating the attackers. Ivan's pre—war acquaintance, Captain Shvedov, helps out of trouble, who gets him a job at the Dynamo sports society to train policemen in hand-to-hand combat.
