Ari doesn't think much about getting a drunken late-night call from Clark Wilcox, a rival private investigator. She assumes he's drunk and randomly dialed her number until the following morning, when Detective Macallan reveals he committed suicide immediately after hanging up. The death is clearly self-inflicted so the police are willing to close the case and move on. Ari, however, knows there has to be more to the story. If nothing else, she wants to know why he chose her to be his final conversation. She begins investigating the man's life leading up to the fateful moment and quickly discovers he was using his agency to gather blackmail material on his clients. She knows that somewhere in his cache of damning material is someone who didn't take kindly to being threatened. She just has to find out who it is without being caught in the same web that eventually led to Wilcox killing himself.
Meanwhile Dale, while overjoyed by Ari's newfound pain-free changes, realizes that Ari seems to need her less. No late night calls to rescue her after a run, no massages to help her aching back and shoulders. Despite reassurances from Ari that everything is fine, Dale can't help but think about the fact Ari is now a full-fledged canidae... and no modern canidae has ever had a lasting relationship with a human.

Almost ten years ago, Ariadne Willow helped create a stalemate between Hunters and canidae. That peace comes to an end with the abduction of Gwyneth Willow, her partner, Milo Duncan, and the doctor who kept Ari safe while she was in prison. When Milo manages to escape, Ari promises to pull out all the stops to rescue the others.
But this time the Hunters have a plan. Another young canidae is abducted, and her imprisonment is streamed live on the internet for the whole world to see. Unless Ari can find her and stop it, the girl will have no choice but to transform, and canidae will be exposed.
The key to winning may lie in a legendary lost book, a call to arms for all wolves to rise up against the Hunters. Ari worries that unleashing it will only lead to a long, bloody war. But with the lives of her mother and an innocent girl at stake, can Ari really afford to play fair?