The day before a camping trip, Aki Kamiya falls ill, leaving her alone at home with her father-in-law, Ginji. Though Ginji sincerely cares for her and tends to her illness, Aki gradually feels uneasy about his excessive attentiveness. Ginji, who has been lonely since his wife passed, becomes overwhelmed by desire upon touching Aki's soft skin. He gives in to his urges and forcibly takes her while she sleeps. Overwhelmed by intense, penetrating pleasure, Aki loses the will to resist and slips into unconsciousness at the peak of ecstasy. The next morning, she wakes up and heads to Ginji's room, but he is already gone.