The story takes place in the 1960s against the background of the Cold War between the East and the West. Intelligence agencies from China, the United Kingdom, and Eastern and Western Europe launched a fierce espionage war around the core technology of a new communication system. The protagonist Fang Jin travels across multiple countries and engages in a series of humorous but dangerous overt and covert battles with allies and opponents such as Anna and Jack. The three major volumes respectively describe technical competition, secret undercover, and ultimate showdown. Each volume has independent suspense and is also interlocking. The story resolves tension with humor and shows the growth and belief choices of an agent. In the end, in a big game that determines the global pattern, Fang Jin must make a decision between trust and betrayal, ideals and reality.
