Gu Lin is a genius doctor in the eyes of countless medical students, but nobody knows that compared to those honors, what he misses the most is actually when he first stayed on the clinical frontline. When Gu Lin suddenly travels back in time, he finds himself becoming Gu Lin, a first-year resident trainee at Haicheng First Affiliated Hospital, and also activates a system. From that day on, a quiet yet overwhelmingly capable resident trainee appears in the hospital.