When Lu Xiao, a new agent of the National Security Agency, accidentally obtains a mysterious intelligence codenamed "Shadow", he is involved in a dark conspiracy concerning the fate of the world. The genius agent Su Mo secretly assists, and the technical geek Jasper escorts them. The three of them shuttle between humorous daily life and life-and-death tasks. Facing the precise calculations of the gentleman-demon Victor Alan, the team members continue to grow amidst jokes and crises, uncovering layers of mystery. The three volumes of stories are self-contained and intertwined: the first volume mainly reveals the main mystery and builds the relationship between the characters; the second volume tracks the world and shows the youthful growth; the third volume ushered in the final battle and the truth of all the mysteries was revealed - the protagonists not only protected the world, but also gained each other and self-salvation. The book depicts the light and shadow of the world of agents with ups and downs, compact humor, and sincere emotions.