On their third wedding anniversary, Yuuki, a wife, is told by her husband that he has gone on a business trip. He tells her to go to the hotel he has reserved in his place, saying, "Forget about the busyness of daily housework and take it easy." Feeling lonely, Yuuki heads to the hotel with a note in hand. It is a high-class hotel, but after checking in and entering the room, there are masked strangers inside. Yuuki is confused and unable to grasp the situation, so the man quietly hands her a phone call from her husband.