A fantasy retelling of the medieval story of Sir Gawain and the Green Knight.
 
This is definitely not a film everyone will enjoy.  If you are not familiar with the story, then you more than likely will be lost and find the movie to be too weird and filled with way too much fantasy oddness.
 
FUN FACT:  The idea for adapting The Green Knight came to David Lowery while he was setting up a diorama of action figures from Willow (1988) in his backyard.