In Shanghai in 1937, the smoke was not yet thick, but an undercurrent was already surging. Wang Qiang, an employee of a foreign bank, hid the edge of the "Nightingale" and weaved an intelligence network under the eyes of the Japanese army; Fan Li, a daughter of a wealthy businessman, removed the sharp thorns of the "rose" and spied on the enemy's and puppet movements in social circles.
A passing dance caused two parallel lines to suddenly intersect. He saw a gun cocoon hidden under her cheongsam, and she felt there was a password hidden in his briefcase. Suspicion is the background of the first encounter, and testing is the norm in interactions. But when the guns are pointed at the invaders at the same time, the gap between the camps quietly opens.
In the firelight of the secret warehouse, he blocked stray bullets for her; in the shadow of the Japanese headquarters, she deciphered the code for him. Love grows wildly in the intelligence pile, but it is destined to struggle on the edge of the mission. When the Japanese army's "Black Wind Plan" surfaces, they must risk their lives to tear a way out of the cracks in the cooperation between the Kuomintang and the Communist Party and the snare set by the enemy and puppets.
Some people fall down before dawn, and some people walk toward the dawn with their legacy. The surging tide of the Shanghai River has witnessed the most forbearing protection and buried the most fiery sacrifice - and those secret messages hidden on the sleeves and the secret signals at the dance will eventually turn into dark blades that pierce the darkness, reflecting the glimmer of victory.
