It tells the story of spirit doctor Bai Qi as he travels the world to rid spirits of their obsessions. In the process, he meets the sunny Lin Xia whom he has known from a long time ago. Bai Qi is a doctor whose identity is shrouded in mystery. He has one very unusual job to use the power of the Taoyuan to heal spirits. Spirits are humans that have been polluted by worldly desires and only in healing them can they return to their normal lives. By mistake, Bai Qi and a human girl named Lin Xia enter into a cohabitation agreement. As their lives intersect, a memory that has been sealed for thousands of years also rises to the surface. -- Adapted from the novel with the same name, written by Lu Han.