Kyoko has been diligently raising her son Makoto on her own since losing her husband. Makoto has had Kyoko all to himself until now, but he is suddenly introduced to her new husband. Makoto feels lust for Kyoko, whose sensuality has increased under the influence of her new father. Makoto, frustrated that he can no longer have his mother all to himself, seeks Kyoko's body as if to get his mother back.