During the Tianqi years, there was an undercurrent in the court. Lin Yanci, the son of the treacherous prime minister, bears the reputation of "little prime minister" and is trapped in the vortex of power and is repeatedly murdered; Su Jinyuan, the eunuch in charge of the ceremonial department, has a pair of gentle phoenix eyes that hide his sharp edge. He holds the power of the East Factory and is the "laughing wolf" feared by the government and the public. The unexpected appearance of the late emperor's edict revealed the old case of his relatives tampering with the edict and poisoning the emperor's seventh son. It also involved the Beidi secret treaty and the Yanmen Pass crisis. From the thrilling confrontation in the ruined temple in the western suburbs, to the scheming at the water transport terminal, to the palace showdown at the Queen Mother's birthday party, Lin Yanci and Su Jinyuan went from a game of suspicion to fighting the enemy side by side. However, when they were purging their relatives' gang members, they encountered the suspicion of Zhang Chengye's bizarre suicide. It seems that the dust has settled in the court, but in fact there are still hidden forces surging undercurrents. This power struggle related to the country, the country, and the country has no end after all.