On the beach in Shanghai, the undercurrent is turbulent under the neon lights.
Bai Jin, on the surface is the gentle and quiet eldest daughter of the Bai family, but secretly she is a top agent codenamed "Thorn Bird" and runs the mysterious intelligence network "Mo Yujian". Xie Yunjie, the new deputy inspector general of the French Concession, has sharp methods and a mysterious background. He targeted this seemingly harmless lady as soon as he took office.
An "accidental encounter" at a banquet, a confrontation in a rainy alley that shattered the pretense. He recognized the rose tattoo under her collarbone that symbolized the highest level of latency, and asked her if they had known each other during the bloody turmoil in Berlin three years ago. She responded with the blade of a knife, popping the second button of his shirt that he had never unbuttoned on a rainy night in Berlin. Each other's deepest secrets were exposed in the confrontation between swords and eyes.
Since then, the game between hunter and prey has escalated. The undercurrent of the charity auction, the sudden betrayal of the personal maid, the fatal trap of the safe house... Xie Yun pressed on step by step, and Bai Jin cleverly dealt with it. A yellowed "old photo" taken in Berlin in 1919, implicating the parents of both parties, has become the focus of a frenzied fight among various forces in Shanghai - the Japanese "Mei Agency", the International Shadow Alliance, Chongqing and Nanjing.
When trust becomes a luxury product and no one around them can be trusted, these fateful rivals are forced to join forces in the rainy night under gunfire. On the scarred escape route, the flickering kerosene light in the basement reflected the secret past and deep entanglements spanning twenty years.
The chess game has reached its midpoint, and amid the dark rain curtain, they are each other's most dangerous enemies, and the only ones they can rely on in desperate situations. But behind the truth, waiting for them is a more deadly blade.
