The protagonist of the story is a detective named Ilya Mokhov. He has been working in the prosecutor's office in Moscow for many years and has a good reputation. Ilya has managed to solve many complex cases. However, his belief in the triumph of justice disappeared after a confrontation with a criminal gang. Threatening him with imminent harm, the criminals demanded that he close the corruption case that Ilya's team had been investigating for a year and a half. But he decided that he would see the case through to the end, no matter the cost.