The story takes place in a fictional but modern and international urban spy war stage. Lin Ce, a fledgling agent, relies on his unusual humor and IQ to navigate the forces of various countries and colleagues with confusing identities. From a small mission, he is gradually involved in the secretive "Black Cloud Project", involving Chinese and foreign spy organizations, intricate betrayal and redemption. Lin Ce, his partner Song Yan, his military adviser Qin Ye and others, while constantly encountering life and death crises and identity exposure, also continued to resolve the crises with humor and wisdom. In the end, Lin Ce uncovered the terrifying conspiracy of the hostile forces and exposed the real traitors and conspirators to the public. The whole team gained faith and friendship in the process of growth and loss.
