Yun Jiao is the Princess Chang Yi of the Dong Yuan Kingdom who has great martial art skills and is very intelligent. Meanwhile, Feng Qing Yan is the unpredictable Crown Prince Wu Min of Xi Yang Kingdom who has cold personality and a handsome appearance. One day, Yun Jiao was ordered to assassinate the Crown Prince Wu Min of the Xi Yang Kingdom by her father. Unexpectedly, the two of them exchanged bodies with each other. Besides the feud between two countries, they had to confront numerous other problems such as how to take a bath and many others. Despite many things happening, the two of them started to develop feelings for each other.
