With their town devastated by titanic hurricanes, the citizens of the spiral-haunted town of Kurozu-cho--including Shuichi, Kirie and her family--find themselves cut off from the outside world. Reporters and rescue teams cross the mountain range into Kurozu-cho only to find themselves unable to leave. Trapped inside the cursed ruins, the desperate survivors struggle and huddle together, waiting to run into giant snails or worse. The very laws of nature are changed as the spiral sucks them in. And to fight it, or to escape, the last survivors must go to the heart of the horror to witness what may be their evenutal fate...