This is the fifth and final book in the Rule Series.
Jack is lost without his brother. All he can think about is getting Billy back regardless of the risk. Still a vampire, he knows his time with Silver is running out. How can he forget when Cowboy is constantly reminding him? Cowboy wants to hit the road, but how can Jack leave when Silver is still in danger? With the dark wizard dead, another arises to take his place. William has the wizard's power. Just because he hasn't made a move against them yet, that doesn't mean he won't. Why won't anyone listen to Jack? They are still in danger, all of them.
A mysterious illness threatens Jack; a new ally tries to help; and everything is riding on Jack's failing powers.