Su Qingyuan, a top cultural relic restorer, was unexpectedly caught up in the prosperous Tang Dynasty by a piece of blue light from a gilt step from the Tang Dynasty! Wearing a T-shirt and jeans and living on the streets of Chang'an, she was regarded as an outlier, but she amazed the whole city with her "family secrets" (which are actually modern repair skills).
Lu Jingyuan, the cold and ascetic Shaoqing of the Jingan Division, accidentally bumped into this "wonderful woman" while investigating a case. She can recognize perjury, break down traps, and even shake fragments can provide her with clues, leaving him confused and surprised. When she is in danger on the street, he protects her with a cold voice; when rumors spread, he strongly proves her innocence; at the critical moment of life and death, he holds his hand and promises, "Where Qing Yuan is, I will be there."
The gilt step holds the secret of Princess Yong'an's death, and also binds the fate of the two. Political enemies accused her of being a "witch" and wanted to sacrifice her. The vassal king's rebellion caused a bloody storm in Chang'an. She formed a think tank with the princess's best friend and a gentle female doctor, and joined hands with Lu Jingyuan to break into the ancient tomb and expose the conspiracy.
Modern restoration technology collides with the machinations of the prosperous Tang Dynasty, and the cold-faced Shaoqing confronts the sweet wife from time-travelling. Amidst the flash of swords and sweet daily life, they must not only protect the peace of their home and country, but also pursue a love that goes both ways, and finally create a good story in Chang'an!