Gao Yang, a ruthless modern capitalist known for his unscrupulous schemes, awakens in the body of a disgraced noble heir in the Great Qian Empire. Immediately upon transmigration, he faces execution for tearing down an imperial edict and suffers the humiliation of having his engagement publicly broken by his fiancée, who seeks a more powerful husband amidst shifting political tides. Instead of begging for mercy, Gao Yang embraces his new identity as a 'Poisonous Strategist,' a master of dark tactics who believes that in a world teetering on civil war and barbarian invasion, only the most vicious methods can secure stability.

When brought before the formidable Empress Wu Zhao, he shocks the entire court with his cold-blooded logic and willingness to sacrifice morality for results. Rather than punishing him, the Empress recognizes a kindred spirit in this 'Living King of Hell.' Now, Gao Yang must navigate a treacherous landscape of scheming ministers, rival generals, and feudal lords, using his modern cunning and ancient ruthlessness to purge the empire's corruption and rise as the most feared advisor in history.