In 1943, Shanghai was undercurrent during the isolation period. Lu Juefei, a military engineer who returned from Germany, was ordered to lurk inside the Japanese "East Asia Heavy Industries". His mission was to obtain a high-precision machine tool drawing that could change the situation of the war. Bai Mansheng, the new pillar of Paramount in the French Concession, was singing to the tune of the whole city, but no one knew that her true identity was a cryptography expert from Chongqing, and her mission was also to share the blueprint.
Two hunters wearing masks met under the swaying lights of the dance floor, thinking that the other was just a move in their plan, but through repeated trials and life-and-death encounters, they saw through each other's deepest disguises. When their mission runs counter to their heart's desire, they must make the final choice between loyalty and love, the righteousness of their family and country, and their personal survival.
