The Great Planes, a desolate foundation of stone and a vast ceiling of stormy cloud walled in by a black abyss. Oa is launched into this strange world where he quickly learns that times could be much better. The Planes are dying, and an old evil has emerged to seal their fate. Oa embarks on a journey to save his new home. He is joined by a wanderer who totes a talking backpack, a wisecracking inventor, her loyal companion, and a long lost ship. Together the unlikely group must learn the secrets of the Void if they hope to stop the judgement that has been passed on their world.