Ten years into her marriage and without children, Keiko has been forced into a sexless relationship for the past five years. Wounded by her husband's infidelity, she sought affairs of her own, only to be left with emptiness. Confronting the question of whether she is "too serious about sex," she resolves to find answers through making an adult video. To help her relax, the director invites her to a hot spring resort. In the mixed-gender bath, she opens her heart and body, experiencing pleasure with a remote-controlled vibrator outdoors, then driven to the peak of excitement through bondage play. A deeply moving work that explores the inner world of a married woman, fusing emotion and ecstasy.