The latest in this popular long-running series about a French detective. A decomposing corpse in a locked room, a drowned nun and a knifer in a club are all part of the daily routine for Commissionaire Pel and his team. However, after an armed robbery turns into a tragedy Pel suspects there's worse to come. Infiltrating the gutter groups with an undercover agent, Pel and Lapeyre from Paris try to trace the man behind the terrorist organisation that's using local girls as pawns in a deadly game.