The Shadow Ledger, formerly called The Devil’s Contract takes place in a world very much like ours but a few key differences. Typically fantasy races such as elves, dwarves, fairy, dragons and such all exist and have been in the world since it’s beginning. As such, things like worrying about skin colour mean very little. Also, magic, while not powerful, is common and so well understood it can be replicated with technology.
Some things still remain mysteries however. There is no proof of divine beings, an after-life or ghosts. There are other planes of existence, but only the fae realm is commonly known of or able to be visited. The others are too dangerous, either getting to them or the planes themselves. Demons and angels like in our mythos do exist, but they don’t actually confirm the existence of divine beings, as they know nothing of that, and don’t even call themselves that. They are rare themselves, only being seen if they want to be seen, and they never answer questions of a metaphysical nature. In fact, if anything, they are more like some kind of rare species from another plane of existence.