The book is a travelog of a body of water in Canada called the Hudson Bay. It is located north of Ontario, west of Quebec, northeast of Manitoba and southeast of Nunavut. It is an inland marginal sea of the Arctic Ocean and drains a very large area that includes parts of southeastern Nunavut, Alberta, Saskatchewan, Ontario, Quebec, all of Manitoba, and parts of the U.S. states of North Dakota, South Dakota, Minnesota, and Montana.