Su Wantang, an orphan girl from the Qingling Sect of the Immortal Sect, was sent to Beiyan to treat the meridians of the sickly prince Chu Zhaoye because of her proficiency in medicine. During the process, she discovered that Chu Zhaoye's illness was closely related to her parents' death while investigating the Beiyan royal family's conspiracy. Su Wantang relied on the medical skills accumulated over the years to cure Chu Zhaoye, and at the same time, she slapped the sect's disciples who discriminated against her, resolved the serial conspiracy of the Beiyan royal family, and revealed the truth about her life experience. The two gradually fell in love through their shared experiences, and eventually Su Wantang became Beiyan's medical concubine, guarding her family and country with Chu Zhaoye, and fulfilling her exclusive promise of "Only I can cure you."
