A group of friends finds themselves stalked by the flatulent, masked slasher Leo Killer in a series of low-budget, crude, and gore-filled encounters at a legendary campsite. Just when the survivors think the air has finally cleared and the nightmare is over, a new stoner-fueled vengeance rises from the depths to claim a fresh batch of victims. Will anyone truly escape the stench of the lake, or is the body count destined to keep rising alongside the pressure in Leo's gut?