Tomifumi lives happily with his wife Kaori and her widowed mother, Rieko. One weekend, while Kaori is away at a class reunion, he shares drinks alone with his mother-in-law. Tipsy, he admits that he was stunned when they first met because she looked exactly like his first love. An uneasy attraction fills the room, and perhaps driven by the loneliness she has felt since losing her husband, Rieko suddenly kisses him...