Ji-won is in the middle of a happy time with a man who came over to spend the night when he hears the sound of a fight coming from next door. he brushes it off at first, but starting the next day, drunken voices singing breakup songs echo through the night. Unable to endure it any longer, Ji-won finally goes over to the neighboring apartment.

There, he finds Hyun watching a video from a singing competition—a video that has become Ji-won’s dark past. At the same time, Hyun is startled out of his wits when the man from the video suddenly shows up…