The Ballad of a Tang Dynasty Physician in Chang'an tells the extraordinary story of Lin Yue, a leading student at a modern medical school who accidentally transmigrates to Chang'an during the Tang dynasty after a laboratory accident. Wearing her white coat, she looks completely out of place on the ancient city's streets, and in her confusion she stumbles into Su Yu's clinic. Su Yu, a kindhearted young physician with a modest local reputation, takes her in. Drawing on her solid knowledge of modern medicine, Lin Yue joins forces with Su Yu to fight an epidemic in the city. Their innovative combination of Chinese and Western medicine achieves remarkable results, and the two gradually fall for each other. However, Lin Yue's unusual ways arouse the suspicion of corrupt court officials, who accuse her of being a witch. The emperor orders her arrest. Su Yu risks his life to protect her, goes to the palace to plead her innocence, and accepts the daunting task of curing the Consort's long-standing illness. After researching day and night, the two finally succeed. They not only avert the crisis but also receive generous rewards from the emperor. From then on, they spend the rest of their lives together at the clinic, passing down and advancing the combined practice of Chinese and Western medicine. Their unwavering love is celebrated throughout Chang'an for generations, becoming a legendary romance that transcends time and inspires envy.