In the mission to find a cure for the deadly A.E. virus plaguing Earth, the Terraformars are not the only enemy. A squad has turned on the Annex 1 crew, seeking to capture Akari Hizamaru and Michelle K. Davis by any means necessary. As the body count rises, the scattered squads struggle to survive and contact Earth for reinforcements. But can they hold the line in a battle for Mars and humanity on two fronts? In this complete second arc, alliances are shattered, friends turn into enemies, and the mystery of the hyperevolved cockroaches grows ever deeper.