The Nangu royal family has only one princess from generation to generation, and she must marry the Beituo royal family.
Nan Guyue is an exception. As a man, he was raised like a daughter by his father, queen and mother.
Outsiders don't know that there is no such thing as a princess in the Nangu royal family. When she was five years old, Nan Guyue learned the art of foley from a reclusive master, and she has never used the original voice since.
Bei Tuoming has been learning the ways of the emperor since he was a child, and he also knew that he would marry a princess from Nangu in the future.
The two never thought they would fall in love with each other. Unexpectedly, there are many conspiracies and they make mistakes again and again. Can they work together together?