The biggest problem left over from the war, the Zero Domain, has always been controversial in the international community. Tokiyuki, the director of the Rongcheng Intelligence Bureau who has been working on the Zero Domain, was entrusted with an important task at a young age, but unexpectedly received a request from his superiors to send retired soldiers to assist in the investigation. This made Director Shi quite dissatisfied. The fact that retired soldiers were in charge of intelligence work was just adding to the chaos. They were disdainful at first, but they could get closer to each other at any time, and things were not that simple. The powerful forces join forces to see who is the real mastermind behind the scenes.
Purpose: Spy—a person who carries a mission and walks in the dark.