This drama is a 2012 SBS TV drama. It is based on the ancient Joseon Dynasty and travels through time to modern Seoul. It tells the story of a prince looking for true love. 300 years ago in the Joseon Dynasty, the prince Lee Gak (Park Yoochun) lost his beloved Crown Princess and summoned three ministers, Song Manbo (Lee Minho), Do Ji-sun (Choi Woo-sik), and Yu Longxu (Jung Seok-won). In the process of investigating the cause of Crown Princess's death, they were assassinated by assassins and accidentally traveled through time and space to Seoul in the 21st century. They appeared in the rooftop room of Park Ha (Han Ji-min). The kind-hearted Park Ha took them in and arranged a job for them. Afterwards, the prince also met Hong Se-na (Jung Yoo-mi), who looked similar to Crown Princess, and was mistaken for Tae-yong (Park Yoo-chun), the long-lost grandson of Chairman Ryu (Ban Hyo-jeong). He not only became the heir to the company, but also determined to pursue Hong Se-na. After experiencing the conspiracy of two eras, the truth gradually surfaced. The image of the Crown Prince of Joseon, Concubine Hwa Rong (Jung Yoo Mi) and her sister Fu Rong (Han Ji Min), overlapped with the image of Hong Se Na and Park Ha in Seoul. The Crown Prince finally found the answer...