After escaping Fort Lewis, the genetically-engineered Dogman known as D-128 resurfaces in the vast wilderness of Mount Rainier National Park—triggering a string of brutal killings that leave local authorities baffled and the government scrambling to contain the truth. But when Rick Jamison, D-128’s former handler, is sent in alone, he discovers something far worse: D-128 isn’t the only one out there. As signs of a second, more feral Dogman begin to surface, Rick realizes D-128 may not be hunting humans—he may be enforcing a boundary. And what lies beyond that boundary could tip the balance between control and chaos.