Luke Warren has spent his life researching wolves. He has written about them, studied their habits intensively, and even lived with them for extended periods of time. In many ways, Luke understands wolf dynamics better than those of his own family. His wife, Georgie, has left him, finally giving up on their lonely marriage. His son, Edward, twenty-four, fled six years ago, leaving behind a shattered relationship with his father. Then comes a frantic phone call: Luke has been gravely injured in a car accident with Edward’s younger sister, Cara. Suddenly everything changes: Edward must return home to face the father he walked out on at age eighteen. He and Cara have to decide their father’s fate together. Though there’s no easy answer, questions abound: What secrets have Edward and his sister kept from each other? What hidden motives inform their need to let their father die or to try to keep him alive? How can any family member make such a decision in the face of guilt, pain, or both? And most importantly, to what extent have they all forgotten what a wolf never forgets: that each member of a pack needs the others, and that sometimes survival means sacrifice?