Oh, Sanya Utkin is not happy about the summer holidays - not everyone can stand traveling in the company of his aunt and younger sister! But is this a reason to shirk the investigation? After all, the mountain on the slope of which they set up camp has a bad reputation among the locals for a reason. Tourists who dare to stay here disappear under mysterious circumstances, and strange voices are heard from underground at night. Sanya doesn’t believe in the stupid horror story about the “Savage Cemetery”. So he finds himself, together with his faithful rat named Tolsty, somewhere in the depths of a cave labyrinth, without a flashlight or landmarks, but close to hidden criminals...