This drama focuses on a group of detectives in the Seoul Gangnam Police Homicide Division who solve crimes based on real life cases with their variety of skills and investigative methods. At the forefront of the team is the impulsive and hotheaded detective Park Se Hyuk and the cold, commanding police chief, Jung Il Do. Park Se Hyuk's passion for his work and rough personality results in a tendency to take action first before thinking later, in contrast with Jung Il Do's by-the-book style.

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?