Angie Graves trains dogs on all kinds of scents: guns, bombs, even cadavers. But when she is approached with the idea of training a dog to track zombies, she is not so sure. She needs a different dog for this line of work, and the only one available is a dog named Murder who she rescued when she found him left for dead. The problem is, Murder is nothing like a hero dog. He is scarred emotionally and physically. He is slow to trust, has a mischievous mind, and obsesses over his chicken toy. But if he and Angie can learn to work together, they may be able to solve the riddle of where the zombies come from, and why they are snatching up people.