Xiao Jianyuan, an undercover codenamed "Blue Bird", had just stolen the core information of the Japanese army's "Sakura Project" when he was shot in public by his immediate boss - the gun had no bullets. The boss sneered: "The organization suspects you are a double agent, unless you find the lurking 'venomous snake' within three days." But on the night he took over the investigation, the only informed liaison officer died suddenly and strangely, and all the clues pointed directly to himself. No one knows that Xiao Jianyuan's amnesia is fake. His real code name is "Abyss" and he is a legendary intelligence agent marked "dead" in the files of both the Kuomintang and the Communist Party. Three days later, at the celebration banquet at the Japanese military headquarters, he stuffed the "Viper" tape into the general's wine glass and knocked on the table with Morse code: "Next, it's your turn."
