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One night, Hiroshi is bothered by incessant knocking coming from the hall outside his door. He sees a large, stringy-haired woman pounding on his neighbor's apartment door, though she leaves soon after. However, the next day the woman returns, and this time she seems to have her cold, frightening sights set on Hiroshi...
In the seemingly-normal small Japanese town of Kurozu-cho, odd events are beginning to take place. Residents are becoming obsessed with spiral - whirlwinds, snail shells, pottery, or anything with a spiral design. But when strange events start happening in the town, with spirals appearing in disturbing places, can anyone escape their horrible draw?