On the highway at the entrance to a small quiet town, the body of a teenager Alik is found. Not far away in a ravine – the car of a stranger Shatsky, who was traveling from Moscow. The initial version of the accident is dismissed when water is found in the lungs of the deceased. If he was killed, then who? The young investigator Anna suspects an outsider, her boss Mikhail Sergeyevich believes that the killer is someone from his own. During the investigation, to which Shatsky joins, wanting to justify himself, it turns out that many in this town had motives for murder.