In the 1940s, Shanghai was in turmoil. She is "Red Satin", a cold-faced female killer who specializes in clearing obstacles for the underground intelligence network. There are blades and roses hidden under her cheongsam. She is the "Blue Cheongsam", the youngest and capable female detective in the patrol room of the concession. She firmly believes that the law can lead to peace. A bizarre banker's death caused two trajectories that should not have intersected to collide violently. Hunting and dealing, testing and confrontation, in the urban jungle filled with conspiracy and gunpowder smoke, they are each other's most deadly opponents and the only light that shines into each other's lives.
