In the near future, when concrete walls have been erected around the ghettos of suburban Paris and the police have abandoned them to lawlessness, a neutron bomb is stolen by a drug lord and set to kill millions of people in blighted District B13. Steely undercover cop Damien (Raffaelli) springs former criminal and B13 local Leito (Bell) out of jail to infiltrate the underworld, dismantle the bomb, and free Leito's kidnapped sister Lola (Naceri) equipped with little more than their hands, feet and fearlessness.

This breathless, breakneck French flick dances along the cutting edge of real-life action, rejecting big-budget CGI for daredevil stunt work. Bell, who helped popularize a death-defying European street sport of parkour, literally runs up the walls and leaps from rooftops to land on his feet (these sequences served as inspiration for the memorable opening chase sequence in "Casino Royale”"). The brainchild of producer Luc Besson (often called the Spielberg of France) and first-time filmmaker Morel, this cheeky, kinetic barnstormer is an irresistible marriage of cartoonish shoot-'‘em-ups with actual, I can't-believe-what-I-just-saw physical feats.