Dave is fourteen years old, entering high school, and living with his family in a cabin on Oregon's Mount Hood. But he isn't the only one approaching adulthood and its freedoms that summer. Martin, a pine marten (a small animal of the deep woods, of the otter/mink family), is leaving his own mother and siblings and setting off on his own as well. As Martin and Dave's paths cross on forest trails and rocky mountaintops, they and we witness the full, unknowable breadth and vast sweep of life, and the awe inspiring interconnectedness of the world and its many inhabitants, human and otherwise.