An evil fate haunts the outskirts of the Moscow police department: someone is cold-blooded and mercilessly killing one by one the employees of this department with a sniper rifle. What is behind these murders? The search leads Moscow City Prosecutor's Office investigator Churilin to the distant Ural city of Sosnovsk, where people are dying in the same way under the bullets of professional snipers. Here the “case” is entrusted to the successful investigator, the idol of the townspeople, Kamorin. And no one can guess on whose command the killers, “fighting dogs,” as they call themselves, act—some are killed, others are intimidated, and others are subject to tribute.