Mystery novel author Xiao Yu time-travels to become a small clinic doctor, binds a consultation reward system, and opens live consultations relying on medical knowledge, micro-expressions, and logical reasoning. He first deduces from chest tightness and abnormal heart rate that coconut milk was secretly spiked with blood pressure medication by a husband, then assists the hospital in locking down the pathogen of a newborn clustered infection, and is subsequently specially recruited by Qilu Hospital, handling difficult and complicated cases one after another such as the severe allergy of the Buddhist nun Jing'an and the sudden leg pain of the mukbang streamer Wen Ya, gradually proving his strength amidst skepticism.