In 1937, Shanghai fell. Xiao Yibai, the secretary lurking next to the traitor Zhao Yulin, personally got rid of the traitor on a rainy night and learned the whereabouts of the top-secret "Underwater" list.
The mission was completed, but Xiao Yibai received a bolt from the blue: the organization deemed him a traitor. Just because Zhao Yulin only met him one person before his death.
Overnight, the heroes turned into traitors. The organization wants to arrest him, and the Japanese invaders are searching for him. Bearing the stigma and being isolated and helpless, Xiao Yibai fell into a desperate situation.
He wiped the bloody gun with cold eyes. The list has been burned, believe it or not.
In this dark Shanghai, he must survive alone, deal with murderous intentions from all sides, find out the truth, clear his name, and let the "dark river" truly become a deadly blade against the Japanese invaders.
This is a hard-core spy story about loneliness, betrayal and desperate counterattack.
