Argenti agent Darren Sumner spent fifteen years hunting werewolves, but one night of betrayal sent him from his family of assassins into the arms of werewolf Aden Richter. Neither can deny their passion nor their hunger for the other, but as Darren tries to find his place in this new world, he wonders whether desire can be enough.

Rumors of an upcoming power struggle between the packs in Washington, DC, bring the question of Darren's role to the forefront. Is he Aden's partner and a leader of the pack? Or is he nothing more than Aden's boytoy, placed outside his family? Darren struggles to prove himself as the tensions between the packs mount and Aden's ex-lover puts a plan of vengeance into action.