A couple of European mercenaries, journeying to China to find the secret of (or supplies of) black powder get embroled in a battle on the great wall to keep out creatures that rise every 60 years. Matt Damon plays William who finally finds a cause worth fighting for after many years of being a mercenary. It's a slight plot with lots of monster action and some breathtaking visuals. Despoite what I read in one review it's not 'white man shows the locals how to save themselves'. The locals are doing just fine on their own. Matt Damon is always worth watching so this was a good way to spend a wet Wednesday afternoon on the two-for-one deal.