An ambitious prosecutor rises through Korea’s elite by marrying a famous actress, only to be pulled into a ruthless power cartel where hidden informants, corporate heirs, and political players collide in a brutal struggle for survival and control.

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.