Natsumi, on a hot spring trip with her fiancé, encounters a maid at the inn who looks exactly like her old flame. Upon learning his name, she realizes he's the son she gave up for adoption 22 years ago. Though she initially considers leaving with her fiancé, she decides to stay for one more night. It's impossible not to love the son she gave birth to. As he massages her back, the touch of his skin awakens memories of her past lover and the warmth of her son, making it impossible to resist the forbidden intimacy that now beckons.
