You'll wish it were only a nightmare...When a summer camp at idyllic Crystal Lake reopens 25 years after the tragic drowning of a young boy named Jason, the woods fill with the happy squeals of young campers and the sight of the furtive couplings of libidinous counsellors. But when a violent rainstorm isolates the lake, one-by-one the counsellors are horribly murdered in this film that launched a modern horror genre.