Su Jin, a lively and intelligent woman, disguises herself as a man and enters the court to find out the truth about the injustice done to her relatives. She boldly overturns the table and investigates the mystery, implicates the prince, punishes the treacherous and corrupt, and fights against the powerful officials. Her fate has gone through ups and downs, but her original intention has never changed. She meets the iron-blooded censor Liu Chao Ming and the passionate prince Zhu Nan Xian. Their destinies are intertwined between the struggle for power and the choice of affection, and together they write a legendary story of people pursuing light in the darkness.