Rex Valentine, a young novelist prodigy, moves from New York to Loon Lake, Idaho with his orphaned teenage sister Penny, who is recovering from illness caused by a weak heart. Rex and Penny hope to find a new life, where Rex can find new inspiration for his novels and Penny can thrive better in a more natural environment. They arrive to find the community divided over the reintroduction of wolves into western Idaho. Rex meets Virginia Thorne, the young wildlife biologist who the Department of Wildlife has put in charge of managing the wolves in the area, and Penny is befriended by Virginia's...