Divine doctor Ji Heng encounters a low point in life after his divorce, but unexpectedly regains the inheritance of the True Dragon Holy Hand. To repair the jade thumb ring, he does not hesitate to sell off his industries in Jiangcheng and search for the rare exquisite jade marrow. By a twist of fate, Ji Heng takes over the treatment of the Wang family's old master, wielding the Ghost King Thirteen Needles to resolve the Yunnan state's exotic poison. Faced with skepticism from Western medicine, Ji Heng proves himself with superb medical skills. However, the Wang family's internal strife surges in the undercurrents, and Ji Heng gets drawn right into it, having to deal with accusations of illegal practice while protecting the Wang family's eldest young miss. The seven-day high-difficulty treatment is about to begin; can Ji Heng stand out amidst the dual challenges of medical skill and statecraft?