He Zhizhou was admitted to Imperial University at the age of 16 and graduated with dual master's degrees at the age of 20. He was once a genius doctor who stood at the top of the world's surgery. Three years ago, an operation failed. He was so disheartened that he went to the emergency department of Jiangcheng No. 1 Hospital to work as a resident doctor incognito. He just wanted to live a life of fishing. He wears a white coat and is two sizes older, moves his camp bed to the duty room, plays games at work, and sleeps after get off work. But whenever the life of a critically ill patient hangs by a thread, he can't help but take action - rescuing a cardiac arrest in just one sentence in 22 minutes, triaging a batch of 15 injured people in seconds, and even providing expert corrections for perfect scores in the assessment. Word of the miracle spread throughout the hospital, and everyone was asking who the resident doctor was.