Tushan Jiu, a knife seller who sells on credit and bears an ancient curse, descends the mountain to fulfill an old promise and break free of her restraints. She enters into an engagement with Xie Shiyu, a son of destiny. Carrying her family's ancestral ledger, she travels around collecting long-overdue debts for knives, building up her dowry while using her unique knife-selling skills to resolve one mysterious supernatural incident after another. As they spend their days together, the two gradually fall for each other. At first, Tushan Jiu only wants to break the curse, but in the end, they fall deeply in love and remain devoted to each other.