Lin Yang, the eighteenth-generation sect leader of the Divine Doctor Sect, descends the mountain carrying the marriage contract arranged by his master to seek out his fiancée, Yan Qingcheng. When they first meet, Yan Qingcheng disguises her identity as Zhou Tong to seek medical treatment, and Lin Yang uses the Nine Profound Needles to save her life. The Yan and Jiang families attempt to tear up the marriage contract, but Lin Yang destroys both families within a single day. He protects Yan Qingcheng as she establishes the Qingcheng Group, single-handedly wiping out evil forces such as the Chen family and the Hong family. When an overseas assassin organization targets Yan Qingcheng, Lin Yang kills its commander, Nanping, and unexpectedly obtains the Dragon King's Poison. With the secret assistance of his four senior sisters, Lin Yang establishes himself in Hangcheng through his extraordinary medical skills and martial arts. As his relationship with Yan Qingcheng grows deeper, the two face the conflicts and dangers of the martial world together.