One day, a strange old man suffering from amnesia collapses, and the wife—whose husband is away on a business trip—along with her father-in-law, takes him in and brings him home. Though uneasy, the wife ends up temporarily caring for the elderly man alongside her father-in-law. As she bathes him and engages in close physical contact during caregiving, the long absence of intimacy with her husband stirs uncontrollable sexual desire within her, leading her to give the old man a blowjob. Her father-in-law secretly watches the act, overcome with jealousy, and this sparks a new shift in their relationship. As caregiving for the old man intertwines with sexual encounters with her father-in-law, the wife becomes increasingly entangled in a web of new desires and inner conflict.