In the world of pure karma and immortality where karma is plagued by obstacles and plagues secretly arise. The protagonist Qin Wenjie was originally a virologist in the apocalypse. He accidentally traveled through time with the unfinished antidote "Pure Source Serum" and became a mediocre medicinal disciple in Xuanhu Valley. While treating his fellow disciples, he was shocked to discover that the "turbid heart epidemic" ravaging the world of cultivation had the same origin as the zombie virus. Relying on modern medical thinking and the prototype of serum, he embarked on a unique path of "medical cultivation", purifying karma with medical treatment and cultivating blessings and wisdom with benevolence. In the process of cultivation, he met Lin Qingyi, the true successor of the Jingye Sect who believed in "bearing the cause and effect", and also had a collision of ideas and complicated entanglements with Xie Wuchen, the genius of the Duanchen Pavilion who advocated "cutting the cause and effect". Faced with the spread of the "turbid heart epidemic", the conflict of opposing ideas, and the secretly spying "Tao Heart Trialist" who intends to use the plague to cleanse his karma, Qin Wenjie gradually becomes involved in this grand conflict concerning the survival and foundation of the cultivation world. In the end, he not only perfected the antidote and resolved the plague, but also promoted a "cognitive revolution" about the nature of spiritual practice as a "doctor", proving that "taking on" and "purifying" rather than "cutting off" are the right path to the great road. He himself also achieved the state of "making great use" in helping the world and saving people, and found the home of the great road where medicine can be used to enter the Tao and cultivate both blessing and wisdom.