Jiang Qingyue, the saintess of Jiuyou Village, descends the mountain with two hundred yuan of public funds in her pocket and three powerful spirit pets by her side. Armed with three binding marriage contracts, she initially intends to collect enormous unpaid debts from wealthy families, but ends up canceling two of the engagements one after another. She unexpectedly discovers a shocking conspiracy hidden within Haicheng's Canghai Pharmaceuticals. Her former betrothed, Huo Jinglan, has been turned into a living vessel for a Gu insect. The two accidentally enter into a life-sharing pact in which their heartbeats are intertwined. While battling schemes from powerful families and exposing the truth behind a fake heiress's identity, she leads her spirit pets through one challenge after another and confronts the ruthless villain Gu Canghai. She settles the blood debts of human experiments conducted twenty years ago, ultimately finds the mother Gu, and brings every evildoer to justice. In the end, she and Huo Jinglan celebrate a magnificent wedding and remain together happily ever after.