An orphaned survivor of a general's family, Ling Xiao, conceals her identity and lies low in the West Market for ten years, carrying a blood feud for the destruction of her family. Under the guise of a fortune-teller, she secretly investigates the truth behind the old case. From outsmarting the pawns of powerful ministers in the marketplace to overturning the power structure of corrupt officials in the imperial court, she uses strategy as her blade and the hearts of the people as her shield, uncovering the shocking dark secret of how imperial power framed loyal and good subjects. Amidst the chaos of the contending heirs for the throne and the turmoil of the realm, she restores discipline to the imperial court with the bearing of a general's family and protects the common people, ultimately ascending to the imperial throne. Having endured all the perils of heaven and earth, she still cherishes the original innocence of the grass and trees.