The Green Knight challenges anyone in King Arthur's court to exchange blows with him. King Arthur agrees, but Sir Gawain decides to do it.
" 'That he dares to stoutly exchange one stroke for another' " (Line 69).
No, let me King Arthur.
Sir Gawain decapitates the Green Knight. The Green Knight picks up his head, and tells Gawain to come to his chapel in a year to take his blow.
" 'Come to the Green Chapel, I charge you, and take/ A stroke as you've given' " (Lines 175-176)
Sir Gawain meets a lord at a castle. They make a deal to exchange their gifts at the end of the day. "While the lord is out hunting, the lady attempts to seduce Gawain" (Page 237).
I will hunt and you will stay here. At the end of the day, I will give you meat and you will give me what you receive here.
" 'For nothing on Earth, however uncanny, can kill him' " (Line 226).
The lady gives Gawain a piece of silk that is supposed to give him immunity. He does not tell the lord about this gift.
I will take it.
The Green Knight takes strikes at Gawain three times. The first, Gawain flinches. The second, the Green Knight stops. The third, he barely cuts into Gawain's neck. He does not kill Gawain.
" 'Good! You've got your heart back! Now I can hit you' " (Line 277).
The Green Knight explains that he is the lord of the castle. His wife was acting on his behalf. He did not kill Gawain because he proved himself to be honorable. The Green Knight invites Gawain back to his castle, but Gawain returns to Camelot.
" 'That sash you were by your scabbard belongs to me;/ My own wife gave it to you, as I ought to know' " (Lines 336-337).