During the Xuanhe period of the Northern Song Dynasty, Bianjing was flourishing with flowers and undercurrents. The "Boguxuan" run by {Gu Yan} is famous in Bianliang for its accurate appraisals, but a sudden disaster occurred - the strange bronze tripod that was entrusted with the appraisal was stolen late at night, and the entrusted merchant died mysteriously. Kaifeng Mansion listed Gu Yan as the number one suspect. In order to clear his grievances, he relied on his extraordinary knowledge of antiques to travel between antique shops and the mansions of powerful people. Unexpectedly, the bronze tripod turned out to be a token used by Western Xia spies to subvert the Northern Song Dynasty, and there was a huge espionage network hidden behind it. While evading pursuit, Gu Yan deciphered the secret information in the antiques, and joined forces with the upright agents to peel off the cocoons. Before the shadow of the Jingkang Incident approached, he vowed to uncover the core of the spies and strive for a glimmer of hope for the turbulent Northern Song Dynasty.