When their mother is brutally murdered by a demonic spirit, brothers Dean and Sam are changed forever. As a result, their father, John, raises the boys with an almost obsessive paranoia about the paranormal and trains them in the ways of ghost-busting. As Sam gets older, he longs for a quiet life with his girlfriend, away from the dangers that come with battling malignant spirits. But when John mysteriously disappears, Sam and Dean are forced to relive their demon-slaying days as they scour the country in search of their father. Unbeknownst to them, their journey is taking them ever closer to the evil entity that claimed their mother's life - Presented here is the first instalment of the show's second series.