With his wife Yuri visiting her hometown for a class reunion, Toru finds himself alone at home for the first time in a while, relishing the freedom. But his solitude is interrupted when an unexpected guest arrives—Hitomi Katase, a woman Yuri had confided in about her personal struggles. Hitomi suddenly shows up at Toru's house, confronting him with harsh words. Yet her true intentions lie elsewhere. In reality, Hitomi has orchestrated a scheme to satisfy her own hidden desires. Unaware of her real motives, Toru is left bewildered by her aggressive behavior, gradually drawn into her seductive trap.