Lin Chen, a young cardiac surgery resident, suffered repeated clinical setbacks due to his lack of experience and almost lost his confidence in practicing medicine. By chance, he inherited a mysterious pocket watch and unexpectedly gained the ability to "disease imaging" - he could clearly see the location, cause and development trend of lesions in the patient's body. With this "golden finger", Lin Chen quickly grew from a "marginal person" in the department to a diagnostic expert, solving many medical problems. But along with ability comes the jealousy of peers, the shadow of shady secrets, and the search for the source of ability. With the company and support of emergency department physician Su Qing, Lin Chen not only matured in his medical skills, but also uncovered the truth about the sacrifices of his predecessors. In the end, he adhered to his original intention as a doctor and became a truly benevolent doctor.