Lin Nuan, a field doctor who traveled through time and became cannon fodder in a novel, started in a cold palace with no advanced medical equipment, no support from his comrades, only a dilapidated palace, a weak body, and ubiquitous murderous intent. He could only protect himself cautiously until he met Pei Xuan, the general of Zhenbei who died early in the novel. She used her medical skills to help him survive his death and take the initiative to control his destiny. Using medical skills as a shield and wisdom as a spear, Lin Nuan found a unique path of growth in ancient times. She proves that a doctor's benevolence can also show his sharpness, and that being a palace concubine can still change one's destiny.