A horror from a world long dead... A question that should never be answered... A trap laid a million years ago snaps shut. When Eric Wallberg's nightmares about Longwood Chemical plant become terrifyingly real, he is forced to choose between the security of Brigg's Ford and a chance to destroy an ancient and powerful evil. Venturing out into a world wracked by apocalyptic forces, he and his companions find themselves fighting for their very survival in a surreal subterranean complex haunted by alien memories. Hunted by masked cultists and the faceless dead, Eric must make a choice between the man he wants to be, and what he must become to stop the Prisoner.