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In the Republic of China, where the warlords were fighting, a scrap of information was left on a piece of paper with a hole in it, leading to the definition of four "suspects" to find out whether one of them was a doctor. She had no experience as an agent. The heroine Tana's mission was to rescue and evacuate doctors (to develop life-saving drugs to save infected wounded soldiers). She and the male protagonist Han Yu had a love story while performing a secret mission, and successfully rescued and evacuated doctors with the help of the organization. Suspect 1, Red Dust Woman Suspect 2, prisoner Suspect 3, the mute girl selling flowers Suspect 4, an officer without class symbols