Luo Qingchuan is a simple and kind-hearted girl from the 21st century. One day she accidentally travels through time and ends up in the 1700s, in the Forbidden City, during the reign of the Kangxi Emperor. She meets her favourite historical figure, the fourth prince Yinzhen, the future Yongzheng Emperor. However, she has to learn the hard way that history books do not always tell the whole story and her broken heart might just be mended by the most unexpected person. Her wit and knowledge of the future puts her right in the middle of the heated competition for the throne. Can she alter history? Whom will she fall in love with? Whom will she choose?