Lin Changfeng, the successor of Qingcheng Mountain, obeys his master's order to go down the mountain holding three marriage contracts, originally intending to break off the engagements and be done with it, but unexpectedly gets embroiled in wealthy family disputes, the investigation of old cases, and grievances of his master's sect. Shen Nanqiao is afflicted with a rare poison and her father has gone missing, while the Huo family secretly covets the Qingcheng Seal. While practicing acupuncture to save people and breaking through the situation to cancel the engagements, Lin Changfeng investigates the truth of twenty years ago. As the traitor of his master's sect appears and the Huo family's conspiracy is exposed, he finally understands that what is more important than the marriage contract is the person he truly wants to protect.