Lu Yuan woke up from a coma and was told that he was a deeply lurking "sleeper" and his mission goal was to destroy an organization called "Ouroboros". As the investigation deepens, all clues prove that the leader of "Ouroboros" is himself in the last year before he was injured. Was he betrayed in the past, or was he tampered with now? Is it the organization or the "me of yesterday" that he must fight against?
