When an ice comet slammed into Venus, its toxic atmosphere was terraformed into one capable of sustaining human life, turning the planet into a viable colony. Yet the new world was harsh: crops failed, resources ran low, and competition for supplies intensified, bringing the two inhabited continents to the brink of war. Reporter Susan Sommers arrives in Aphrodia’s capital just as the city is attacked by Ishtar. Only the intervention of Hiro Seno and his Battle Bike team saves her from certain death. Soon after, Aphrodia falls under Ishtar’s control, forcing Sue, Hiro, and their teammates to flee. Their unique skill with Battle Bikes becomes their sole hope for survival.