A large corporation led by Mick, a megalomaniac CEO, announces to the world a miraculous microchip that will benefit mankind. The press conference is interrupted by Enoch, a former associate, working with a resistance group determined to stop Mick from executing his real plan, which is to control the world by implanting his microchip in people. Feeling threatened, Mick enlists the help of Xiao Yu, an elite assassin he had captured and imprisoned many years ago.
When Xiao Yu refuses to help him, Mick kidnaps his wife and daughter to pressure him. To save his family, Xiao Yu is forced to accept a mission to recover three pieces of source code that were stolen by the resistance and return them to Mick to complete his plan. During the mission, Xiao Yu meets Ye Yan, a reporter investigating the shadowy corporation. The fate of mankind rests in their hands.
A Communist spy serving as an officer of the Japanese puppet regime joins hands with Russian and Korean spies to execute an assassination plot.
In the year 1941, Nazi Germany declares war against the Soviet Union. Given that Manchukuo's loyalties lie with Cheng Tian, the Russians are caught in a situation where they face threats on all sides. Their intelligence agency devises a long-term plan in secret. Communist spy Tang Fei (Liu Yunlong) receives a mission to infiltrate the enemy by pretending to be one of their own. At the Security Bureau, he crosses paths with Cai Meng (Han Chae Young), a woman determined to fight against the Japanese regime. They gain each other's trust as they try to outsmart the enemy within their own territory.
