From publisher blurb:
Bloodlines & Black Magic takes place on an alternate Earth, very similar to the one you and I know. It has much of the same history (with only slight variations), the same level of technology, the same social and political problems, and nearly all of the population believes everything is as it should be.
This world, however, is wrong.
Instead, the world of Bloodlines & Black Magic divides itself into three worlds, only two of which the PCs can work in (at least initially); the Mundane World, the Secret World, and the Invisible World.
As these heroes explore the Mundane and Secret Worlds, they begin to discover clues - physical and social - that lead them deeper into the dark, forgotten, and secret places of the world. Over time, and after great effort, some of these heroes discover the Invisible World. Characters able to Pierce the Veil and those who step directly into the Invisible World learn to collect psychic clues - bits of critical data stored only in this world.
As player characters complete episodes of Bloodlines & Black Magic, they slowly gain levels and with those, the power needed to survive in the Secret and Invisible Worlds, both of which hold terrible secrets and the monsters who guard them.