David Cruz is trying to settle into ex-military life. After three deployments, he's now back in the States, running the Hope's Crossing kennel to train dogs for military applications. But when Atlas, a Belgian Malinois suffering from PTSD and grieving for his dead handler, returns from duty and shows no signs of improvement, David reluctantly realizes he needs to call in the big guns. Enter Evelyn "Lyn" Jones, a celebrated dog whisperer who arrives at Hope's Crossing to try to help Atlas. Sparks fly between Lyn and David immediately, and not in a good way; he's about to throw her off the property when he sees a flicker of connection in Atlas. When a threat on Lyn's life seems linked to Atlas's handler's death, the two must find a way to work together to protect the kennel, the dogs, and the fragile peace they've built for themselves. David's not sure he can trust her, but she's the only one who's made any progress with Atlas, and the attraction between them is undeniable.