In the 20-30s of the last century, a wave of crime swept the country. Counter-revolutionary elements raised their heads, banditry, murder and robbery flourish. Chekists from the OGPU-NKVD are fighting a mortal battle with crime day and night... The south of Russia has been shaken by a series of brutal murders for ten years. Bandits kill everyone indiscriminately - men, women, old and small. Serial murderers, having once exhausted human blood, became like man-eating tigers - they want to drink it again and again.