One brother trying to rescue his sister. One honest cop trying to follow orders. One psychotic villain with a nuke. This could pretty much be the plot for a desi flick :-)
Banlieue (District) 13 is set in the near future in France where all the 'tough' neighbourhoods have been cordoned off by high-walls and barbed wire. The cop has to break into one of these (District 13) to try and deal with the nuke. He needs the help of Leito (the aforementioned brother) to help him get in.
This movie has stunning action scenes featuring parkour. Parkour is an urban art form, the artist tries to move from point A to point B in the most efficient manner possible. So, 20 foot jumps, full speed runs, diving right through ventilators that don't seem quite big enough for a man and the like are common. These guys (both the heros are accomplished parkour practitioners. One of them was a originator) literally flow through buildings, roads, corridors, rooms and other assorted obstacles without the slightest pause. It's balletic in grace. Brilliant stuff.
In all, a very good movie. Simple plot. Fantastic action.