Six young people meet on an archaeological dig in a remote corner of Greenland. Excavating the unsettling remains of a Norse society under attack, they also come to uncover their own demons, as it becomes apparent that a plague pandemic is sweeping across the planet and communication with the outside world is breaking down. Increasingly unsure whether their missives will ever reach their destination, each of the characters writes a letter to someone close to them, trying to make sense of their situation and expressing their fears and dwindling hope of ever getting back home.