Jinhee is the daughter to the Kings personal doctor who saved his life many years ago. When her father passes away due to a past injury, the King plans for Jinhee to marry one of his sons, Jongin, to keep their family in the palace like he had promised his old friend. Many people are unhappy with an non-royal woman marrying a prince but with no where else to run, Jinhee unhappily agrees although she had a childhood promise to marry her fathers assistant, Chanyeol.