Rin Yamazaki and her college friends have their car break down in the mountains on a trip. Fortunately, a kindly old man offers to let them stay at his house. But there's a legend about the swamp outside the mansion...

Rin Yamazaki and her college friends have their car break down in the mountains on a trip. Fortunately, a kindly old man offers to let them stay at his house. But there's a legend about the swamp outside the mansion...