During the reign of Emperor Gaozong of the Tang Dynasty, Xu Mo, the young shopkeeper of "Yonghedang" in Chang'an West City, had a unique skill of appreciating ancient times passed down from his family. He originally just wanted to keep his shop and live a stable life, but because of his eyes that can tell the difference between authenticity and time, he was successively involved in the mystery of counterfeiting, undercurrents in the court, and old affairs in the palace. Behind every artifact that is handled, there is a grudge and secret buried by time. He must find a way out for himself and those around him in a confusing situation where authenticity is difficult to distinguish.