Su Wanqing, a female student in the Republic of China, was involved in the shocking conspiracy of the national treasure "Ping Fu Tie" because of an ancient ancestral book. In the strangulation of the four forces of the military, the puppet government, the underground party, and the Japanese invaders, she was constantly betrayed and exploited, and was repeatedly reversed in desperate situations. In the end, she transformed from a chess piece to a chess player, protecting the national treasure and the righteousness of her family and country at the cost of her life.
When Peiping fell in 1937, Su Wanqing, a history student at Yenching University, accidentally discovered an ancient book left by his father, which contained a treasure map of the national treasure "Pingfu Tie". She originally wanted to live a low-key life, but she was targeted by various forces: military agent Lu Chenyuan coerced her to cooperate, high-ranking puppet government official Gu Mingxuan set up a trap to trap her, underground party professor Shen Zhiyuan pretended to protect her, and even her most trusted best friend had been bribed by the Japanese invaders.
In desperate situations of life and death, Su Wanqing discovered that everyone was wearing a mask, and her life experience hid a secret that could subvert the entire conspiracy. She struggled repeatedly between betrayal and redemption, used tricks to provoke infighting among various forces, and finally completed the most deadly counterattack at the critical moment of handing over the national treasure.
