Bruno, chef de police in the French town of St Denis, is already busy with a case when the body of an undercover French Muslim cop is found in the woods, a man who called Bruno for help only hours before. But Bruno's sometime boss and rival, the Brigadier, doesn't see this investigation as a priority - there are bigger issues at stake. Bruno has other ideas. Meanwhile, a Muslim youth named Sami turns up at a French army base in Afghanistan hoping to get home to St Denis. One of Bruno's old army ...