Set in the Joseon Dynasty period (during the confusion of justification and the period of espionage and transition from ming to ping), when the public desire for social reform was at a high.
The three-arc historical action-romance drama, in which warriors and spies step back and forth along borders, follows Crown Prince So Hyeon, his two bodyguards, Heo Seung Po and An Min Seo, as well as Park Dal Hyang, a yangban
