It is about a Joseon crown prince who, after his wife dies mysteriously, time travels to the future where he encounters familiar faces, modern-day devices, and corporate intrigue.

Their leader, Lee-gak claims to be the Crown Prince of Joseon (Park Yoochun), along with his entourage – scholar Song Man-bo (Lee Tae-ri), personal bodyguard Woo Yong-sool (Jung Suk-won), and palace eunuch Do Chi-san (Choi Woo-shik).

Tae-mu, believing that he already killed his cousin in New York, lives in constant fear of his devious act being discovered by the family and "Tae-yong" (aka Lee Gak) who claims not to have remembered the event.

Lee Gak also believes that marrying Se-na in Seoul in the year 2012 would bring him closer to solving the mystery of the Crown Princess' murder in the Joseon era.

On February 7, 2012, a traditional wedding scene was filmed at Gyeonghui Palace in Seoul, involving the young Crown Prince Lee Gak and Hwa Yong.