After spending a year on Baltan negotiating a new relationship with Earth, UN Space Commissioner Sally Bud’s associate commissioner arrives with an old problem. New Ontario, a planet Sally regrettably knows all too well, has Earth worried, again. A band of rebels with mysterious powers tied to a massive structure on the planet’s surface has usurped the cruel "masters'' who ruled the planet. Earth wants answers, and Sally is tapped to provide them. During her mission, she finds that the former slaves now have the aid of a mysterious benefactor who is using them to build a machine that bends time. Who is this benefactor and what does he want? The answer is more terrifying than the question and Sally must work to prevent a disaster that could have implications throughout all of history, human and alien.