In the two-part season premiere airing over two consecutiveweeks, Josh Gates and Heather Amaro venture into the hauntedruins of Spike Island, once Ireland's most infamous, brutalprison. Drawn by claims of frightening paranormal activity fromboth visitors and inmates alike, the team investigates whethercenturies of torment and suffering inside the fortress' wallshave unleashed something sinister. With an ominous presenceunderfoot, the search for answers leads them on a harrowinginvestigation through the prison's grim cellblocks andterrifying labyrinth of tunnels.