Geoff Cooper is a battle-weary werewolf moving his pack to Washington, D.C. in search of a new start. A rare oasis from inter-pack fighting, the city seems an ideal place for them to find peace. Or so he thinks. They are immediately beset by a shadowy government organization. Its mission is simple, yet shrouded in mystery: rid D.C. of werewolves by any means necessary. Cooper refuses to back down, determined to protect his pack's hard-won sanctuary. As the struggle between agents and werewolves intensifies, an insidious threat lies dormant. It's a secret that could destroy them all – but will either side realize the true danger before it's too late?

The Agency kept werewolves out of Washington D.C. for over 200 years – then Geoff Cooper and his pack showed up. Despite The Agency's best efforts, Cooper and his wolves were intractable, and its mission was compromised. Now, a twisted monster rampages across Washington D.C., freed from a prison the agents had been unknowingly safeguarding. The former enemies must now team up to deal with the creature before it becomes too powerful to stop. It is a threat unlike anything either group has faced before. As the body count rises, can this uneasy alliance hold together long enough to succeed?