In the far future, the man known only as Rook wants out. He reckons anywhere is better than the crumbling planet Exodus, where all of nature—especially its imported animal population—has grown out of control as the world's engine has utterly failed. Scavenging for an escape vessel, he's interrupted by the power-hungry bear master named Ursaw, who won't stop until he rules all of what remains of Exodus. Also: Who is the mysterious Dire Wolf? And is she Rook's ally…or enemy?