When the barrier between our world and the spiritual realm is torn down, the entire earth becomes haunted. Now a lone survivor may hold the key to closing the barrier, but first she must run a gauntlet of ghosts in the most haunted city in the world.
It's all out war between the surviving humans and their ghostly conquerors! In the final battle, Sarah and her friends face off against the ghosts, demons, and revenants of Abaddon. The fate of the world hangs in the balance in the conclusion of the series.