The crown prince’s wife gave birth to twins, but twins were considered a bad omen, so one of them (the girl) was supposed to die. But the mother begged for her daughter’s life to be spared. So the little girl was secretly sent away from the palace. A few years later, the other twin, Lee Hwi, died of an illness. The Crown Prince’s wife concealed her son’s death and brought her daughter back to the palace, raising her as Prince Lee Hwi. Lee Hwi eventually became Crown Prince, but he feared that his true identity would be revealed. Because of the secrecy surrounding her, Lee Hwi cannot let anyone get close to her. She hides her emotions from others and makes sharp remarks. Jung Ji Woon is Lee Hwi’s teacher. Jung Ji Woon comes from a noble family; he is handsome, intelligent, and enjoys life with optimism.