When Homicide Detective Kang Oh Soo hit a dead end in his investigation of two seemly unrelated murders, except for the Tarot cards left behind at both crime scenes, he sought help from Seo Hae In, a woman with psychometry ability. She revealed that the killers were different in each murder, but the victims were chosen for their connection to a death of a high school boy. Later, the cases proved to have one more thing in common: the suspects have the same defense attorney, Oh Seung Ha.

Seung Ha's defense for his clients severely shaken Oh Soo’s conviction to catch the Tarot Card mastermind. Oh Soo was reminded that years ago he had killed a high school classmate in a fight. He was acquitted of all charges and began his life anew. Now, someone has came back to revenge the boy’s wrongful death by killing those who got him off.

Chae-gyeong is an ordinary art high school student. One day, she hears totally unexpected news that, based on her grandfathers will, she must marry the unemotional Crown Prince Lee Shin who attends the same high school. Free-spirited Chae-gyeong resists the proposal, but reluctantly marries him to help her debt-ridden family. As she struggles to adapt herself to the proper manners and royal duties of palace life and to her disagreeable husband, Lee Shins sentimental cousin and second-in-line to the throne Yul steps into her life. She feels like she can rely on Yul to help her, but cant help worrying about her haughty, cold-hearted husband. To help bridge this gap, the senior members of the royal family take some special measures to get them to spend the night together. Along the way, you will encounter numerous delightful episodes among the cute and lively Chae-gyeong, the cold heartthrob Lee Shin, the handsome, down-to-earth Yul, the perfect ballerina Hyo- rin who just cant get over Lee Shin, and all the other members of the royal family. Will the Crowned Princess, Chae-gyeong be up to the challenges of royal life?