Core settings
- Era background: In the twenty-sixth year of the Republic of China, the current situation was turbulent. Qingchuan County, located in the southwest, was located at the junction of three provinces and became a gray area where various forces intertwined. Opium smuggling and arms trading were undercurrents.
- Female protagonist: Shen Qingwu, 22 years old, a medical student who returned from studying abroad. Her father is Shen Jingting, the president of the Qingchuan County Chamber of Commerce. She appears gentle, but in fact she is secretly investigating the truth behind the "accidental" death of her brother Shen Qingyan three years ago.
- Male protagonist: Lu Zhengnian, 28 years old, who appears to be an antique dealer traveling in Qingchuan, but is actually a member of a secret organization. He is responsible for intercepting smuggled arms by the Japanese army and has crossed paths with Shen Qingyan.
- Core conflict: When Shen Qingwu was investigating the cause of his brother's death, he was involved in the game between the Japanese army, local warlords and secret organizations. From testing each other to fighting side by side, Shen Qingwu gradually uncovered the conspiracy under the fog of Qingchuan, and at the same time faced the choice between family ties and faith.
