The story takes place in the fictional East Asian city "Hidden City", where different intelligence organizations fight openly and secretly. Cheng Bei and his team encountered extreme crises and bizarre missions one after another. Not only did they have to complete the national mission in the dangerous situation of the spy sea, but they also had to face the test of the team's internal information, identity and trust. Between Liu Feng's double disguise, Anna's treacherous background, Tang Xue's entanglement, Uncle Jiang's humorous advice, and Zhao Lei's technical flaws, Cheng Bei continues to make mistakes and grow. As the truth is gradually revealed, the fate of everyone is moving towards an irreversible intersection. In the final battle, in an atmosphere of laughter and tears, the team completed the seemingly impossible task and gained their own redemption and growth.
