A team of archaeologists on a remote Arctic expedition finds themselves isolated by a global epidemic and a harsh winter, forcing them to confront their own mortality and write final letters home. The six-person team, comprised of individuals from the United States, England, and Scotland, arrives in Greenland at the start of summer to search for lost Viking settlements. As they settle into their isolated existence, news of a devastating epidemic back home cuts off their communication with the outside world. Facing the brutal realities of an impending Greenland winter with inadequate supplies, the team members—Nina, Ruth, Catriona, Jim, Ben, and Yianni—begin to write letters to their loved ones, knowing these may be their last words.

The novel is recognized for its exceptional and haunting debut, weaving a rich tapestry of personal narrative, history, love, grief, and survival. It has been described as both a heart-pounding thriller and a highly sophisticated novel of ideas. The epistolary format, with each character's first-person perspective in letter form, allows for a deep dive into individual experiences and fears. Critics have noted its skillful blend of historical exploration with intense psychological drama, creating a compelling narrative of human resilience against overwhelming odds.