Norse sailors bound from Norway for Iceland in the 10th century get blown off course and stumble onto Greenland, an accident that becomes one of the more improbable footnotes in Viking expansion. The film traces how these settlers, described as Danish and Norwegian in origin, adapt to a landscape of ice, fjords, and near-constant summer daylight far harsher than anything in Scandinavia. It covers the practical questions any Norse colony there would have faced: what they farmed, hunted, and traded, how they built shelter from turf and stone rather than timber, and how contact with Iceland and Norway thinned over the following centuries. The midnight sun of the title is not just scenery; it frames how disorienting the polar environment must have been for people used to Scandinavian winters and summers alike. Without a narrator's certainty papering over the gaps, the film treats Greenland's Norse settlement as a real historical puzzle, an outpost that thrived for generations before vanishing from the record.