It is New Year at Camelot and a mysterious green knight appears at King Arthur’s court. Challenging the knights of the Round Table to a Christmas game, he offers his splendid axe as a prize to whoever is brave enough to behead him with just one strike. The condition is that his challenger must seek him out in a year and a day to have the deed returned. Sir Gawain accepts and decapitates the stranger, only to see him pick up his head, walk out of the hall and ride away on his horse. Now Gawain must complete his part of the bargain, search for his foe and confront what seems his doom…