Tomo devotedly cares for her father-in-law Eiichi, but while her husband is away on business she realizes his dementia has grown severe. He asks for breakfast moments after eating, wanders outside and troubles strangers, then begins calling Tomo by his wife's name, Yukiko. When Eiichi and his equally out-of-control brother turn violent, the two elderly men rape the busty wife from front and back, relentlessly pounding her until the ordeal leaves her overwhelmed and broken into submission.