McKinley, a malamute, is a good dog -- he's reliable and trustworthy. Whether it's watching over the other dogs of Steamboat Springs, Colorado, or taking care of his human pup, Jack, McKinley never even thinks of letting anyone down -- until he meets Lupin. Lupin is a she-wolf and she's urging the dogs of Steamboat Springs to leave their domesticated lives and join her wild pack. And though she scares McKinley, he also finds himself drawn to her and the life of freedom that she offers. For the first time, McKinley's loyalties are torn. Should he stay with his humans and continue to lead the dogs of Steamboat Springs? Or should he join the wolf and live freely, like his ancestors did? When the wild calls, what will McKinley's answer be?