The episode picks up where last season's cliffhanger episode left off. Dean is in the hospital in a coma following being rammed into by the semi truck and doctors do not give him much chance of surviving. Yet he is able to walk the halls as a disembodied spirit. There he meets Tessa, a young woman apparently in a similar predicament, and sees a strange apparition that seems to draw the life from the sickest patients. Unable to save Dean any other way, John Winchester attempts a very dangerous plan to save his son's life.