In his past life, doctor Lin Yi failed to save his severely ill younger sister, and his entire family was crushed by illness and debt. Regretful, he is reborn before the tragedy, awakening the All-Knowing Medical God System. Bringing his past medical experience into the Emergency Department of Longsheng Central Hospital, he conquers various difficult surgeries with master-level medical skills, withstands exclusion and suppression, and while saving lives in the emergency room, desperately earns money to protect his younger sister who suffers from dilated cardiomyopathy and his family, rising from a despised resident to a top-tier all-rounded emergency master doctor.