In this historical fantasy, based on the classic medieval poem during the days of King Arthur, the gallant Green Knight gallops into the court and makes a gruesome challenge to the Round Table Knights. He dares any of them to successfully chop off his head. If they fail, he gets to hack off theirs. Brave Gawain accepts the challenge and with a mighty swing slices off the Green Knight's noggin. Unfortunately, the headless body calmly picks up the head and places it back on his shoulders. The honor-bound Gawain then must fulfill his destiny at the palace of the Green Knight.