After her husband's unemployment forces her to return to work as a caregiver, Ai finds herself surrounded by elderly men with disturbing personalities. In front of one man, she is drenched with scalding porridge, urinated on until her hair is soaked, forced to jerk off his cock during baths, and when he's displeased, held underwater in the tub until she nearly drowns. These daily horrors leave deep psychological scars. However, the old man's life is short-lived, plagued by repeated heart attacks. Ai is made to masturbate completely naked under his animalistic gaze, summoned in the middle of the night, and brutally taken against her will. Her once ordinary life spirals into madness. The old man whispers to her, "If I only had one year left to live, I'd trade it down to one week just to have you." And, "I've always wanted someone to desire me desperately, to truly love me with everything they had." These words carve themselves deeply into Ai's soul.