Chu Qinghuang, a 21st-century forensic medical examiner, opens her eyes to find herself transported into the body of the legitimate daughter of the Prime Minister, who is about to be executed by beheading. Using her extraordinary forensic skills, she overturns the case on the spot. From a mere bargain, she becomes entangled in an unending relationship with Jun Mochen, the cold-blooded Ninth Prince. She battles her scheming half-sister, exposes conspiracies within the imperial palace, and investigates the truth behind her mother's death, carefully advancing at every turn. Just when she finally rises to the pinnacle of power, she discovers that the cursed bloodline flowing through her veins forces her to choose between love and her own life! To defy fate, the two embark on a perilous journey to uncover the mystery of the Heavenly Books of the Four Kingdoms. Inside the ancestral shrine, an ancestor lying in a crystal coffin reaches out a hand to her. Will she exchange one life for another, or remain trapped for all eternity? In this final wager against Heaven, can she protect her beloved, her child, and herself?