A virtuous and beautiful housewife, Maya Sawamura, diligently cares for her ailing father-in-law at her husband's request. Living alone in his hometown, the elderly man relies on her for daily support, and Maya devotes herself wholeheartedly to nursing him back to health. However, whenever her husband is away, she is repeatedly assaulted by her father-in-law. This troubling situation dates back over a year. Despite her resistance, Maya finds her senses overwhelmed by his surprisingly vigorous and relentless thrusting, her body betraying her will as she succumbs to his overpowering advances.