The play mainly tells the story of the open and secret struggles, love and hatred between the four secret agents of the "Dragon Protector Villa" in the mid-Ming Dynasty, Cao Zhengchun, who was powerful, ambitious, cruel, plotting to usurp the throne, and killed the loyal, and Hou Zhuwuwu, a man of great talent and strategy, deep in the city, extraordinary courage, sincerity, and the courage to correct the current situation.
