This drama is about Lee Rin (Jung Il Woo), a prince who lives a lonely life outside the palace since childhood, even though he is born in the direct line of descent. Lee Rin has wealth and good looks, but lives as a rebel to overcome internal struggles. Due to the fact that he can see ghosts, Lee Rin hides his secret and pain from childhood with a smiling face and playful behavior. After meeting Do Ha (Go Sung Hee), Lee Rin will be joining the team of night watchmen and becomes a true prince after seeing the lives of the citizens as he helps get rid of the ghosts.