Lieutenant Peter Cochrane of the Quantar Royal Navy believes he has his future clearly mapped out. It begins with his new assignment as an officer on Her Majesty's Spaceship Starbound, a Lightship bound for deep space voyages of exploration.

But everything changes when Peter is summoned to the office of his father, Grand Admiral Nathan Cochrane, and given devastating news: the death of a loved one. In a distant solar system, a mysterious and unprovoked attack upon Lightship Impulse resulted in the deaths of Peter's former girlfriend and many of her shipmates.

Now Peter's plans are torn asunder as he is transferred to a Unified Space Navy ship under foreign command, en route to an unexpected destination, and surrounded almost entirely by strangers. To top it off, his superiors have given him secret orders that might force him to become a mutineer.

The crisis at hand becomes a gateway to something much more when the ship's Historian leads Peter and his shipmates into a galaxy of the unknown -- of ancient technologies, age-old rivalries, new cultures, and unexpected romance. It's an overwhelming responsibility for Peter, and one false step could plunge humanity into an apocalyptic interstellar war....