Mother (2009)
Fans of The Man from Nowhere will recognize Bin Won (or you might not heh). Great 'thriller', very well done I thought. Maybe not super suspenseful, and not really something you are scratching your head to figure out, but I really appreciated the acting by Bin Won and his 'mother' played by Hye-ja Kim. She was amazing. Been on Netflix for ages now, finally got around to seeing it.