Sir Gawain and the Green Knight is an epic Middle English poem written in the 14th century and set in Arthurian England. It tells the story of the Green Knight, a huge green man who interrupts the yuletide festivities at Camelot and makes this challenge to King Arthur and his knights: Strike me with my axe and receive a blow in kind one year from today. Sir Gawain accepts the challenge and beheads the Green Knight. But what will happen to Sir Gawain in one year?