Yong Tae Mu returns to Korea after killing his lost cousin out of jealousy in the United States, claiming that his cousin, Yong Tae Yong could not be located in New York. Hong Se Na is President Yeo’s personal assistant, who has been having a secret affair with him and is actually Park Ha’s stepsister. Park Ha has been missing for a prolonged period of time and it is revealed that she was in the US after Se Na did not rescue her on a moving truck after falling asleep inside it, at age 9.
Two years after Tae Yong’s disappearance, four men dressed in Joseon era garments, appear on Park Ha’s rooftop house. Hungry, homeless and having nowhere to go, the four men decide to stick with Park Ha. Their leader, Lee Gak claims that he is the Crown Prince of Joseon, the other 3 being his loyal followers. Song Man Bo is the prodigy scholar, Woo Yong Sol is Lee Gak’s personal bodyguard and Do Chi San is Lee Gak’s palace eunuch. One day, Lee Gak sees Se Na who is the spitting image of his beloved wife, who was found dead in a pond back in his century. He is convinced she is his wife’s reincarnation and tries to get closer to her by taking Tae Yong’s place in the company. The company president Yeo mistakes Lee Gak for her grandson, Tae Yong, as they look exactly alike and believes that her long lost grandson had finally returned. Lee Gak realizes that he has travelled 300 years into the future to search for the truth behind the mysterious death of the late Crown Princess Hwa Young.
Park Ha is shocked when she finds out that Lee Gak is, in fact, the grandson of the CEO. Soon, she starts to have feelings for Lee Gak and she is hurt when she finds out that Lee Gak, who still holds very tender memories of his dead wife, is courting Se Na. Unbeknownst to Lee Gak, Hong Bu Yong, Hong Hwa Young’s younger sister was supposed to marry him but switched places with her older sister at the last minute due to an incident that scarred her face for life. Uncannily enough, Park Ha looks like Hong Bu Yong, the girl that ended up loving Prince Lee Gak from afar.
Crown Prince Lee Gak/Yong Tae Yong (Park Yoochun)
Hong Bu Yong/Park Ha (Han Ji Min)
Hong Hwa Young/Hong Se Na (Jung Yoo Mi)
Yong Tae Mu (Lee Tae Sung)