After an old grimoire falls into inexperienced hands, two of Alice's friends discover a portal to the mysterious dead zone and are immediately in need of rescue. Alice has no other choice but to accept John De Grasse's help, and soon finds herself immersed in a world of inter-dimensional terror and deadly intrigue.

Meanwhile, following the catastrophic events of a year ago, Emma remains in hiding, while John is left to deal with the fallout and re-establish the supernatural community's decree—Guard the secrets, keep the gifted ones close.

But at what cost? There have been so many deaths, so many irrevocable losses. And yet, despite the dangers, the forbidden dimensions offer unimaginable treasures and there are those who will stop at nothing to reach them.

Some doors should always remain closed, but after the grimoire's discovery, opening them is becoming all too easy.