The central character is a woman named Evgeniya Firsova, who works in the police force. She is determined to challenge the powerful law enforcement system. During the investigation of a crime related to the murder of her superior, Major Platonov, Firsova personally experiences that the "system" of law enforcement is far from perfect. Evgeniya is known as the best investigator in the department, but even she struggles to cope with the bureaucratic chaos.