"On Guard", a subtitled French film, is all about Auteuil as an 18th century swordsman, mercenary, and bon vivant who finds himself the victim of treachery and the lone custodian of an infant who is the sole heir to a noble rank and great fortune. His task is to honor an oath and restore his charge to her rightful place in the face of countless bad guys with blades and his adopted daughter's growing ardor as she comes of age. Packed with evil men and beautiful women and wonderful locations and lots of swishing and clinking steel, "On Guard" should be a fun watch for anyone into swashbuckling adventure flicks who can contend with 2+ hours of subtitles. (B)