Living in a quiet residential neighborhood, the pure and beautiful stepmother Reiko is deeply troubled by the death of her stepson's beloved dog, Pochi. Since the loss, she has watched helplessly as her son gradually withdraws into himself, shutting out the world. Night after night, seeing him isolated in his room, Reiko grows desperate to reopen his heart. Determined to reconnect with him, she resolves to take matters into her own hands, no matter the cost.