The Phayrumic Empire of Earth is at war with its Martian mining colonies, but far away from the battle, along the edge of the solar system, a new threat has emerged. The Martian mining colony at the Neptunian moon of Galatea has come under attack by the invading Kj’hal. With most of the Martian Aeorforce deployed in the war effort, the colony must find a way to survive.