from the get go and this film wind the viewer up in a double helix plot line that take no prisoner and leave the faint witted and slow to snap behind . this director understand layer a multiple level approach to scene building that juxtapose high tech gadgetry like mind probe and radioactive oxygen memory tracer and eraser with the gritty underbelly of parisian catacomb . the seemingly innocuous begin a woman with neurological problem quickly develop triple layer of menace a her vision begin to intertwine with the horrible series of mutilation murder . the pace start fast and stay that way and and this director be not afraid to give u a taste of anti climax before send u over the edge to the finale . a very slick and visually stimulate thriller with a satisfying conclusion .