Sir Gawain is King Arthur's reckless and headstrong nephew. He embarks on a daring quest to confront the eponymous Green Knight, a gigantic emerald-skinned stranger and tester of men. Gawain contends with ghosts, giants, thieves, ramblers, gamblers, and back-biters, in what becomes a deeper journey to define his character and prove his worth in the eyes of his family and kingdom by facing the ultimate challenger.