Lin Ran, 30 years old, is the youngest director of cardiothoracic surgery in the country and has a bright future. When she opened her eyes, she became a half-dead... Quack doctor who had just been beaten for twenty times on the ancient frontier battlefield. Good news: She's alive. Bad news: There are wounded soldiers all around, and the screams can knock off the roof. The medical conditions are about zero. He relies on dancing masters to treat injuries, incense burner ashes for disinfection, and hemp ropes used to hold shoe soles for suturing. Lin Ran looked at his hands that were shaking like Parkinson's disease, and he didn't know whether he was angry or afraid. "Boiling spirits and salt water! All clean linen has been boiled in boiling water!" "Bake the scissors and tweezers on the fire for a longer time! Don't touch the wound with raw water!" "He has three broken ribs. He will have pneumothorax if he doesn't stop bleeding. Get out of my way!" Facing a group of ancient military doctors who regarded "pus" as "removing saprophytic muscle", Lin Ran almost performed a heart attack on the spot. If there were no antibiotics, she would refine penicillin using local methods; if there was no operating table, she would use door panels to build it; if there was no shadowless lamp, she would have ten soldiers hold up bronze mirrors to reflect the light. From debridement and suturing, bone setting and reduction, to amputation and hemostasis... Lin Ran used his skillful hands to pull back each of the soldiers who had stepped into the gate of hell. Gradually, the style of painting in the military camp changed. The soldiers who once viewed her as an ominous creature now see her as if they were their parents again. Lu Shifeng, the legendary "Ghost Faced General" who was decisive and ruthless in killing, personally stood guard for her, with a trace of undetectable nervousness hidden in his eyebrows: "Military Doctor Lin, my heart is hurting, you... Also take a look?" Lin Ran (cold face): "That's because your conscience is hurting." Lu Shifeng: