Located in the town of Ogden Marsh, Pennsylvania, the United States, the scenery is beautiful and pleasant, and life is comfortable. However, an unexpected incident broke the tranquility of the town. Rory (Mike Hickman), a middle-aged man with a mild personality, broke into the stadium where a baseball game was in progress with a rifle. Sheriff David (Timothy Olyphant) decisively attacked and shot him. The tragedy seemed to be out of control. After that, various bloody and cruel incidents occurred one after another. The originally peace-loving people in the town went crazy one by one, and the paradise-like town turned into a terrifying hell on earth. David and several sane partners discovered that the reason for the townspeople's madness was related to the local drinking water. At the same time, in order to prevent the spread of madness, the government sent troops to block the town. David and his team must rack their brains to escape from this land of death...