Ace aviator and adventurer extraordinaire Nathaniel Cannon, along with his gang of sky pirates, search the jungles of Java for a long-lost city of an ancient kingdom. Treasure and fame await them if they succeed, but old foes chasing the same prize are determined to see them fail.
War has broken out in the Confederacy of Allied Worlds, and it falls to the brave men and women of the Naval Arm to defend their country against the Exile fleet. Over the gas giant Argo, they are losing. With few resources and little time to spare, they must find—and bring to battle—an Exile armored cruiser which has terrorized the spacelanes for too long.