In 2050, with no warning, Earth is invaded and conquered by an alien race called the Inbit. Years later, despite brutal past failures, the inhabitants of Mars Colony dispatch another desperate Liberation Force to reclaim their lost home world. The fleet is almost completely destroyed. However, one survivor, Stig Bernard, finds himself on Earth. He gathers a small group of resistance fighters and journeys toward the Inbit's headquarters at Reflex Point, hoping to gather intelligence and, perhaps, discover a way to defeat them.