"Presumption of Innocence" is a TV series dedicated to the battle between a cynical lawyer and an investigator, with a scandalous journalist at the center. Avrutin is a successful lawyer with a bad reputation. He takes on the most hopeless cases and always wins them. When a police officer's killer is set free due to the lawyer's fault, the authorities assign Major Glebov to gather compromising material on Avrutin and send him behind bars. The unscrupulous Vernitskaya from the criminal chronicles comes to the investigator's aid.