The Dene have lived in the vast Mackenzie River Valley since time immemorial, by their account. To the Dene, the land owns them, not the other way around - it is central to their livelihood and their very way of being. But the subarctic Canadian Northwest Territories are also home to valuable natural resources, including oil, gas and diamonds. With mining came jobs and investment - but also road-building, pipelines and toxic waste, which scarred the landscape; and alcohol, drugs, and debt, which deformed a way of life. Joe Sacco travels the frozen North to reveal a people in conflict over the costs and benefits of development.