I’m not a folklorist, so I’m not sure how common “The Blind Swordsman” story is across Asia. But the most famous films about such a character are about Zatoichi, the Blind Swordsman. Those go back decades, and even inspired a Denzel sci-fi version, “Book of Eli.”
This new Korean thriller is a younger “origin story” of sorts about a Korean warrior, blinded after siding with the losers in an attempted coup, using his other senses to wield his blade.
Looks good, if not remotely as bloody as the many Japanese films about such a character.