Crown Princess Rong Le of Xi Qi state wakes up from a coma with no memories and she becomes suspicious of her real identity due to traces of the past. To form a political alliance with Bei Lin State, Rong Le is ordered to marry Prince Wu You who refuses her. With the failing marriage, Rong Le assumes the identity of a tea house owner and a new name as Man Yao. She begins secretly searching for invaluable books left by the Qin Family that are said to bring greatness to a nation. It leads her to Wu You who falls for her without knowing that she is the princess he rejected. Yet it may already be too late for him to learn the truth because Rong Le is going to marry Fu Chou, the General of Bei Lin State.