The best Assassin in America, some could say the world, is not what you'd expect. She's young, driven and quiet. She looks like the victim, yet she is the villain in the stories the werewolves use to scare their pups. Her alter ego, Scarlet Killer is feared by all, but Riley is still only human, with insecurities and weaknesses. Riley O'conner is the Scarlet killer and she is sent to another town run by werewolves. But this time is different, as she finds herself falling for the enemy.