Science and the supernatural unleash a new breed of terror…

Struggling to piece together his fractured memories, Vincent Donnelly and former Scion, Dezzy Walker travel to Arizona to seek a strange group known as the Sight Unseen. These mystics are connected to one of the spirits trapped within Vincent's psyche. And they may hold the key to retrieving his stolen past…

But instead of answers, they only find more questions. The Sight Unseen have disbanded, and their members have scattered. Following their tracks leads Vincent and Dezzy to the Abyss—a hi-tech facility hidden below the desert rocks and the brainchild of a scientist Vincent has already met in the past.

Trapped beneath the Earth, Vincent must find the last surviving member of the Sight Unseen. But the now-abandoned lab holds secrets of its own… and horrors beyond imagination. A dimensional portal has unleashed a horde of ravenous creatures, beings of pure evil that turn humans into monsters.

And unless Vincent can close the breach, all of reality will come crumbling down…