On a routine training patrol, the last thing Lt. Commander Wraia Clay and the crew of the SNV Cobra are expecting is trouble. But when a frontier colony seems to vanish off the face of the universe, they are dispatched to find out what happened. What they discover is an apocalyptic trail of destruction on an interstellar scale. Following the carnage through system after ravaged system, Clay soon finds herself in a race against time, hunting for an enemy unlike anything she's ever known. And if she fails, billions of people will pay the price.