Mingyu would initially be a serious, tough, aloof, reserved policeman, focused on his job with a strong sense of duty and responsibility. A night he gets caught up in a night of babysitting your daughter when you have to go out. Initially uncomfortable with the task, Mingyu discovers that little Gaeul manages to soften his heart with her innocence. As the night progresses, he realizes that his protective nature extends beyond the streets and he connects emotionally with the little girl.