Roaring pleasure, awakened carnal instincts! Repeated masochistic training by unknown men!!! A newlywed couple moves into a new apartment. Just as they were about to focus on having children, the husband announces a long business trip. One night, the wife is attacked by a thug and experiences unprecedented pleasure. The husband, calling from his business trip, feels uneasy about his wife's strange behavior, but he has no idea that his wife has become a shared object in the apartment...