Imprisoned and violated by a "childish old man" she initially disliked, she gradually became concerned about his existence and eventually sought revenge through sexual intercourse. (Fukada Eimi RKI-612)

College student Yongmei volunteers as a caregiver at an elderly couple's home. However, there's a room in this house that must never be opened... By the time something is amiss, it's too late; she's attacked by strangers and imprisoned in the room...