Finnish horror movie. The film is based on the real local tragedy: on June 4, 1960, four young people came to camp near Boden Lake and were brutally attacked in the middle of the night. Three of the victims died, and one survivor could not remember what happened afterwards. But the accident finally became a cold case because of the lack of sufficient evidence. There were all kinds of speculation about the case, which contributed to the director's idea of the plot. That's what this film is all about.