Wracked with guilt over the suicide of her sister who was tormented by high school bullies young karate student Megumi accompanies a group of friends on a trip into the woods. Attacked by a crowd of poop-covered undead who emerge from an outhouse toilet the group seeks refuge in the home of the strange Dr. Tanaka who conducts experiments on the zombies and who has another fate in mind for the five strangers. Can Megumi's karate help them escape or will she have to rely on the liberating power of farts to save the day?