In 2070 mankind has lived across the inner solar system for decades. And now the first airborne city is about to launch. An accomplishment so revolutionary the United States government wants complete control of it, immediately. The struggling Department of Space will do whatever it takes to get it, starting with blaming the Sky City launch for the worst earthquake in history. To keep control of Sky City, Ben Dawson and his family must fight like their lives depend on it, because they do. And if that means flying to the moon mining colonies and hunting for a secret asteroid to upset the balance of the world economy, fine. Because if the Department of Space wants a fight, the Dawson family is going to give them one.