Why does a man, haunted by a profoundly intimate encounter with an alien intelligence, troubled by a traumatic past, and stalked by a potentially devastating addiction accept an impossible mission to save humanity from certain annihilation? Because he is Aiden Macallan, commander of the Sun Wolf, and those afflictions make him the only person alive who can do the job. It’s 2218 and the enigmatic voidoids that enabled humanity’s fifty-year expansion into Bound Space, are fading out of existence. No one knows why, or who’s behind it, but one thing is certain: if the voidoids shut down, not only will humanity be locked out of Bound Space forever, but it will unleash a cosmological catastrophe of runaway dark energy that tears our universe apart—from atoms to stars. It will happen soon and happen fast, unless Aiden and his hand-picked crew of the Sun Wolf can stop it. But as they set course for the Frontier in search for answers, someone is trying to stop them, following from the shadows, attacking at every step of the way. Now, in a race against time and malevolent forces, light-years from home, the Sun Wolf is humanity’s only hope for survival.