When Ji Zhao, a modern cultural relic restorer, was repairing a silver sachet from the Tang Dynasty, he accidentally triggered the mechanism and traveled back to the Tianbao period, and was involved in the secret fight between Yang Guozhong and An Lushan's forces. The heroine Xu Nanxing is the daughter of the Prime Minister of Honglu Temple. She is proficient in many languages and secretly collects intelligence for the court. However, she is in danger because her family is involved in the dispute between the prince and the powerful ministers. When Ji Zhao was repairing a silver sachet from the Tang Dynasty, a strange light flashed through his eyes. When he opened his eyes again, he was on the streets of Chang'an during the Tianbao period. He was regarded as a refugee because of his weird clothes, and he met Xu Nanxing in a panic. Seeing that his behavior was different from ordinary people, Xu Nanxing became curious and helped bring him back to Xu Mansion. Relying on his superficial understanding of the etiquette of the Tang Dynasty, Ji Zhao temporarily concealed his identity in time travel and regarded himself as an "amnesiac". In the Xu Mansion, he found that there was an undercurrent in the Xu family, and it seemed that someone was secretly watching.
