During the Qinghe period of the Song Dynasty, Zhou Nian'an, a young man from a poor family, rescued the hidden imperial doctor from a cliff and was given the gift of money to teach him as his only disciple. After the death of his immortal master, he cured the city lord's wife of hysteria with his magical medical skills, opened a Zhixin Medical Clinic, and was known as the "Medical Immortal" for his wonderful rejuvenation. Once he was targeted by the royal family, the crown prince and the two princes competed to win over him and got involved in the fight for the throne. He diagnosed the emperor's poisoning, helped him find out the mastermind behind the scenes, and eventually became the Song Dynasty's Medical King known throughout the Song Dynasty! Afterwards, Zhou Nian'an fell into the mystery of imperial immortality, witnessing that Song Emperor Zhao Yan, in order to seek false immortality, doted on alchemists and poisoned the world, and lost his beloved Princess Zhaoyang Zhao Ning. He went to Kunlun to rally an army and led the Snow Lotus Army to kill the tyrant and end the troubled times. He gave up his fame and returned to the medical clinic to study medicine. He discovered the secrets of ancient vitality veins, searched for the spiritual herbs of heaven and earth, and went to Kunlun to collect the spiritual roots of heaven and earth to refine the original immortality pill. Because he saw that the elixir of immortality would cause turmoil in the world, and there was no one left in the world to cling to, he refused to take the elixir, built a real and fake mausoleum, set up nine layers of traps, and buried the elixir and secret records with him as his own. Only the general medical prescriptions are left to help the world and the people, set the ancestral precepts and wait for the world to be unified again, and write a long song of doctors guarding the common people with benevolence.