Set in the constitutional monarchy in an imaginary South Korea, South Korea's Crown Prince Lee Jae Ha is forced to join the World Officers Competition, WOC, by his brother. There, he meets North Korea's strongest female devil instructor Kim Hang Ah.

Cast: Ha Ji-won, Lee Seung-gi, Lee Yoon-ji, Cho Jung-seok, Yoon Je-moon, Youn Yuh-jung