A remote part of the Brecon Beacons has been the site of seventeen disappearances in just five months, leaving the police stymied. The members of Torchwood travel to the area to investigate, and they soon discover a mutilated corpse -- only to realise that it's been left as a decoy while their vehicle is being stolen. Left with no option but to walk to the nearest village, they find it deserted, raising the team's fears that the Rift has widened well beyond the boundaries of Cardiff. But has Torchwood really stumbled upon extraterrestrial activity, or is this a peculiarly human form of horror?