The premise of Wintermute centres around the relationship between Dr. Astrid Greenwood and a bush pilot named Will Mackenzie, whom she hires to fly her and her mysterious hardcase to a remote location in the Canadian wilderness of Great Bear Island. After a mysterious geomagnetic disaster causes their plane to crash land, Astrid and Will become separated. Now the two must survive this cold and unforgiving landscape they find themselves stranded in while doing whatever it takes to reunite safely. Experience the story from their perspectives, and face the struggle to survive head on.