Ilona returned from the camp terribly scared, with a purple stripe on her neck, as if someone was trying to strangle her. She persisted for a long time, and then admitted... it was the black sheet that did it! Of course, Kostya doesn’t believe in all mysticism, but Ilona was fading away before our eyes... And the only way to help her was to go to the camp and find out what really happened. Kostya did not find the black sheet, but through negligence he freed some other dangerous evil spirits... the person who fell under its power dies on the third day. Now we need to save not only Ilona, but the entire camp!