Autumn 1940, Shanghai Concession. Zhou Linyuan, an underground worker codenamed "Nightingale", lurks as an employee of a foreign bank. When a top-secret list accidentally falls into the hands of the enemy, he must find the mole among the Japanese and puppet spies, military commanders, and underground parties within seventy-two hours and regain the list. Every second, someone dies; every step you take, you may step into a trap. This is a war without gunpowder, but more cruel.
