Shen Weiwan, the first female historian of the Dajing Dynasty, originally wanted to inherit her father's ambition and enter the history museum to compile history. Unexpectedly, she was involved in a shocking death at the beginning. Her father was falsely accused of "falsely changing history books" and sentenced to death, and her life was also hanging by a thread. In the history museum, she suddenly discovered that there were strange things everywhere in the history books, and every line was ironclad evidence that the powerful minister Li Prime Minister had tampered with history. In order to clear her father's wrongdoing, and to restore the dust-laden truth, Shen Weiwan used her frail body and a pen as a blade to work step by step in the crisis-ridden history museum. She was repeatedly assassinated, but with the secret help of the seventh prince Xiao Jamyan, she gradually let down her guard. The two went from suspicion to trust, and a secret love arose. With her extraordinary wisdom and fearless courage, Shen Weiwan cleared away the fog and exposed Prime Minister Li's monstrous conspiracy to the public. She not only washed away her father's grievances, but also reshaped the true face of the dynasty with pen and ink. In the end, she not only became a "historical saint" who will go down in history, but also single-handedly amazed the Dajing Dynasty and recast the backbone of history.