A group of detectives discovered murdered teenagers in the city canalization. During the investigation, it becomes clear that no one has ever been looking for them. Studying this case step by step, the police face an absolute evil - the maelstrom of the big city, which sucks in and destroys those whom no one loves and does not wait at home. Evil destroys people with impunity, and each of the heroes will face it personally, look inside himself to meet his own demons and fears.