Debt-collecting blade holder Tushan Jiu is shouldering the art of prophecy, collecting payment only after her blade goes out and the prophecy comes true. She heads to Nancheng to fulfill a betrothal, becoming the fiancée of Xie family power-holder Xie Shiyu. Along the way, she encounters serial murder cases and vengeful spirits one after another, resolving yin-yang entanglements through blade-lending transactions, breaking bizarre occurrences, and cutting down good and evil. Wealthy family rights and wrongs arrive one after another; relying on the rules of a debt-collecting blade holder, she walks between the mortal world and the yin-yang realms.