Undercurrents were surging in the Jokhang Dynasty, and Beishuo was lurking in the capital, waiting for opportunities. Jiang Yan, the court historian, had his head buried in books all day long, and was gentle and courteous to others. Everyone thought he was a weak scholar with no power, but they didn't know that he was the leader of the "Mo Pavilion", an intelligence organization close to the emperor. He had spies all over the city, specializing in hunting down enemy spies.
Qin Wanyuan, the most famous drunken fairy in the capital, is a master of both sex and art. She is a sought-after courtesan among the princes and dignitaries. However, her true identity is the core spy of Beishuo for many years. In order to save her loved ones, she was forced to steal the secrets of Jokhang.
At a dignitary's night banquet, the two confront each other for the first time, and they are all testing each other under the disguise. He pretended to be idle and secretly investigated, while she smiled sweetly and hid murderous intent. Several espionage battles have taken place, with the mission of family and country at the forefront, but in the contradictory identities, inexhaustible feelings have arisen. The traitorous officials in the court collaborated with the enemy, their companions rebelled, and the spy network was surrounded and suppressed at all levels. While the two of them clung to their respective identities, they protected each other in the shadow of swords and swords. When the vest is about to be exposed in public, how to choose between the justice of family and country and the love of the heart? The crisis in the capital has temporarily subsided, but the mastermind behind Beishuo has not yet appeared, and a bigger conspiracy is quietly approaching.