In a community kept hidden, the Enforcers are an elite group of vampires sworn to serve and protect their kind-and follow the Laws of the Blood… As one of Chicago's vampire hunters, Ivy Bailey is responsible for keeping the city's human residents safe-a job that becomes infinitely harder when someone starts committing gruesome acts of magical murder. But what Ivy doesn't realize is that she is a hunter being hunted… Vampire Enforcer Christopher Bell is in Chicago to investigate rumors of a revolution, but when he comes across Ivy being followed through dark streets, what he finds is a ghost from his past. Over a century ago, Christopher fought the vicious London serial killer Jack the Ripper-and won. But now, the Ripper's tainted soul is back-on the hunt once more. Ivy insists she doesn't need protection-especially from a vampire Enforcer. But soon, Christopher finds himself in the middle of a fight between demons and mortals, watching over the frustrating woman who has managed to stir his undead heart….