Fu Xiuchen is the most "incompetent" member of the Shanghai underground party. He is clumsy and meek. He always delivers the most insignificant news in insignificant positions and is regarded by everyone as a marginalized member of the organization. When the entire intelligence network was completely destroyed, the only unsuspected "waste", holding a mysterious key, was forced to restart the silent death machine alone in the most inconspicuous way, under the eyes of the enemy.