Apollo and Dion, a dysfunctional rag-tag pair of demon hunters have been sent to investigate the strange happenings in the industrial city of Havenbrook.
The mission is simple: to find the cultists responsible for a recent string of murders and to bring them to justice. Even if it takes killing every demon on the way there.
But things are never that simple when you deal with the dark arts. Cultists, demon pacts, sacrificial murders all stand in the demon hunters' way as they search for the truth. A truth that will force them to question their own identities, a truth about the absolute evil lurking beyond heaven and earth. The question is, if they find the truth, will they be strong enough to handle it?