Married for six years and working together with her husband, Saki spends her days as a visiting home care worker. Kind and warm-hearted, she works hard to support the household. One day, she is assigned to a new client's home. The house belongs to an elderly man living alone, his son having moved far away. The man once ran a real estate business and made a fortune during the bubble era, boasting that he distrusts banks and keeps several hundred million yen in cash stored in his closet. Tempted by the promise of inheriting his fortune, Saki is gradually drawn into fulfilling his physical needs. He whispers, "When I die, maybe I'll leave everything to you, my dear." Then, with her own words, "Let's keep doing it until you die, Daddy," echoing back, Saki is deceived by this insatiable, wicked old man, her mature body relentlessly devoured under the guise of care.