On the verge of marriage, Momo leaves early in the morning to see her boyfriend off for a business trip. A middle-aged man from next door strikes up a conversation with her, someone her boyfriend also casually chats with. Still, Momo can't shake off the unease she feels toward the man—his gaze seems to be sizing her up, making her deeply uncomfortable. When she returns home from shopping, she tries to ease her wedding jitters by seeking comfort from her boyfriend. But she remains unaware—lurking inside the room is the devilish presence of another man, already waiting for his chance to take him.