The Yamano family lives in a secluded home in a remote Tokyo residential area. Their 27-year-old daughter Haruka suffered a compound fracture in a car accident while traveling in America. Haruka returns home in a wheelchair. There to meet her is her younger brother 19-year-old Koichi. Their father is away from the Yamano resident due to a business trip abroad. Koichi is left to take of his sister for until she can walk again. Not long after, strange occurrences happen in the Yamano home.