Three years ago, the Lin family was brutally massacred, and Xie Weilou, heir to the Marquis of Zhenxi, was framed for the bloodshed and thrown into the imperial prison. Three years later, after regaining his freedom, he discovers that his grandfather is dead, his father has fallen in battle, and the Marquis's estate has changed hands. Meanwhile, the truth behind the massacre of the Lin family proves far more complicated than it seemed. Determined to uncover the truth, Xie Weilou joins the Tianquan Bureau. Following clues involving a missing guard and the Tianya Sword, he digs deeper, only to become entangled in a struggle among princes for the throne, power struggles within the Marquis's estate, and secret plots by the demon clan. A shocking political conspiracy surrounding the Great Xia court is slowly unveiled.