Sir Gawain and the rest of King Arthur's court are startled by a visit from a strange green knight. The Green Knight challenges the court and Sir Gawain accepts. Sir Gawain strikes at the neck of the Green Knight who them picks up his own severed head and vows to return the strike in one year at the Green Chapel. Sir Gawain sets off to fulfill his promise. Along the way he has many adventures that eventually lead him to the Green Chapel where his fate awaits. This animated film is based on the 14th century alliterative poem