A weekend away visiting parents becomes a living nightmare for alex and her best friend marie when a deranged killer breaks in, slaughters family members and kidnaps alex. Hiding to evade capture marie sets off on a white knuckle pursuit to save her friend.new audio commentary by dr lindsay hallaman experiment in suspense a new interview with director alexandre ajathe man in the shadows a new interview with writer grégory levasseurthe darker the better an interview with cinematographer maxime alexandrethe great french massacre an interview with special effects artist giannetto de rossionly the brave alexandra heller nicholas on high tensionarchive 'making of' featurettearchive interview with cécile de francearchive interview with maïwennarchive interview with philippe nahon