The third act reveal of who hired the robbery crew is when I checked out. Of course we should have been eyeing with suspicion the Japanese-American intern, because when we learn her grandmother's drawings of her WWII internment were acquired by the auction house without compensation, any reasonable person would have surmised that her first response would be to contrive a heist plan that would make Hans Gruber smirk with pride, and to exact revenge and get recompense from the auction house in the form of an eight-figure diamond necklace. That sort of injury inflicted on your ancestors naturally would turn you into a Bond-level villain and remorseless killer.