In the half-light of an Alaskan summer night Matt Tulugak pulls his truck off a gravel road and gets out to relieve himself. Looking out over the tundra, he sees a brown gash where permafrost has melted and sloughed off a low hillock. A bony claw reaches out of the mud. He shivers in the light breeze, notices the crescent moon hanging low in the sky, starts to walk. As he approaches the claw it resolves into five huge mammoth tusks arranged in a circle. Within the circle a human skull, half buried and yellow with age, looks through empty eye sockets into a world that is about to change forever.