The Dingbei Hou Mansion was bloodbathed by the rebels overnight. Shen Qingci gave birth to his daughter "Nian'an" in the sea of fire and entrusted his loyal servants Qin Feng and Cui'er to break out with their daughter, but he himself was buried in the flames. Nian'an used the pseudonym "Ajin" and grew up in a military camp and a secret stronghold. He was ignorant of his family's grievances. After growing up, she decided to uncover the conspiracy of the year, sneaked into the capital with Qin Feng, and got involved in the whirlpool of power.
With the help of the mysterious knight Xiao Heng's friends and foes, the intelligence organization "Mo Ying", and the support of allies in the court, Nian An went from first detecting the traces of his enemies and dangerously breaking into Li's house to deciphering secret letters and outwitly seizing evidence, and gradually approached the truth - it turned out that the unjust case in the Hou Mansion was not only caused by the powerful minister Li Song, but also controlled by the hidden royal family.
After a confrontation between light and dark, and a test of life and death, Nian An finally presented evidence in the court, leading key witnesses to confront each other, completely uncovering the full picture of the unjust case, and clearing the grievances of Dingbei Hou. After the father and daughter recognized each other, she joined hands with others to rebuild the Hou Mansion. She transformed from an orphan girl with a blood feud to a sole heir to the Hou Mansion. In the new balance between the world and the court, she continued to write her own legend.