During the Anti-Japanese War, Lin Yi, a soldier of the Chinese army, was captured and escaped death, but was regarded as a traitor and suffered humiliation. In a desperate situation, he activated the 'Spy Shadow Sign-in System'. By signing in every day, you can obtain key intelligence, skills or identity disguise. From then on, he transformed into a top agent, lurking in the heart of the Japanese army, playing tricks on traitors and lackeys, and making enemy invaders frightened. When everyone thought he was a loser, the moment he revealed his identity, everyone was shocked!
