Several months have passed since the incident surrounding Laplace’s box also known as the Universal Century Charter. The Earth Federation Forces dispatches a group of investigators to the severed Axis which is drifting outside the Earth Sphere. Two civilians participate as members of the research group: Arlette Almage and Danton Hyleg. Both have pasts with government service to the Principality of Zeon and Neo Zeon as an engineer and test pilot. Having infiltrated Axis, the investigators come under attack inside a base where no one should be, they are confronted with an incident they never imagined.

Leopold Fieseler, a detective with the Zeon Public Peace Department/Zeon Public Safety Department is charged with investigating terrorist attacks against Zeon government officials led by an anti-Zabi group called Valkyrie. While researching to find out who were the culprits, Leopold gets into trouble when Valkryie supporters within the ZPPD/ZPSD “arrest” him for getting his hands into classified information to help find out who are the culprits for a planned terrorist attack against Gihren Zabi himself.