Gwen recovers an errant piece of alien technology which provides glimpses into the past. But the “ghost machine” doesn't just summon images of long-ago occurrences; it also invests the user with the emotions underlying those events. Experimenting with the technology, Owen witnesses an horrific rape and murder -- unsolved for more than four decades -- and is left devastated by the terror which the victim felt in her dying moments. While the rest of the Torchwood team investigates the device's origins, Owen finds himself becoming fixated on bringing the killer, the now-elderly Ed Morgan, to justice.