Tae-mu (Lee Tae-sung), after killing his lost cousin in the United States, returns to Korea, claiming that his cousin, Tae-yong (Park Yoochun), could not be found in New York City. Meanwhile, Tae-mu has been having a secret affair with Se-na (Jeong Yu-mi), his secretary, who, in turn, runs into her long-lost stepsister Park-ha (Han Ji-min). Park-ha has been missing for a prolonged period of time and it is revealed that she was in the US after Se Na abandoned her on the streets at age 9. Two years after Tae-yong's disappearance, four men dressed in Joseon era garments, fall onto Park-ha's rooftop house. Hungry, homeless and having nowhere to go, the four men decide to stick with Park-ha. Their leader claims that he is the Crown Prince of Joseon (Park Yoochun), along with his entourage Scholar Song Man-bo (Lee Min-ho), Personal Bodyguard U Yong-sool (Jung Suk-won), and Palace Eunuch Do Chi-san (Choi Woo-shik). One day, Crown Prince Lee Gak sees Se-na who is the spitting image of his beloved wife, who was found drowned in the 18th century.