Su Ming, a modern expert in criminal psychology, travels through time to the Great Hui Dynasty, only to find himself starting out as a death-row prisoner in the Heavenly Prison, wrongfully accused and awaiting execution. Using his psychological techniques and ability to see through people's minds, he turns the tables in an impossible situation and crushes the Third Prince's conspiracy to usurp the throne. Impressed by his abilities, the Emperor makes an unprecedented exception and appoints him to lead the Jingye Bureau, an imperial intelligence agency. As he investigates the hidden currents beneath the surface, Su Ming uncovers a shocking secret: the officials throughout the imperial court have all been brainwashed and controlled by the Emperor's secret techniques. Ultimately, Su Ming joins forces with his companions to use counter-techniques to break ten years of mental indoctrination, end the spiritual enslavement imposed by imperial power, and awaken humanity and freedom throughout the court and the kingdom through a silent battle of political intrigue.