Set in present day South Korea, but under the premise that the country is governed by a constitutional monarchy.
Oh Sunny (Jang Na Ra) is a bright and vivacious musical actress who marries the emperor Lee Hyuk (Shin Sung Rok). She becomes involved in the palace power struggle and a mysterious murder that sets off events that threaten the monarchy itself, while searching for true love and happiness. Meanwhile, she falls in love with Na Wang-Sik (Choi Jin-Hyuk) who is a bodyguard of the imperial family. She teams up with Na Wang Shik to uncover the crimes of the Imperial family. Na Wang Shik started working in the palace to take revenge on the person responsible for his mother’s death.