Describe where this conflict unfolds.

On and under the Appalachian mountains, where things that are not men whisper in the darkness, offering threats and bribes. The woodsmen hear them in the creaking limbs, the minors hear them in the dark, and the wiser leave them be. Talismans hammered into iron plaques against them can be found in the timbers that support the mine shaft walls.
Above them the world busies itself with politics and technology, and has no room to believe in faeries. This suits the Lords and Ladies just fine.
In a place of poverty and desperation, blue-collar workers with strain and pain are prescribed painkillers without even a hand wave of a diagnosis. Some of the doctors think they are helping. Some of them think they are maintaining. Class and privilege among the haves and have-nots matters more when there are so many more have-nots. Some call it the natural order. Usually these are the haves.
The Cherokee will tell you that Appalachia was the home of the Nunnehi cast out to this world. They will tell you how the Moon-Eyed people split from the Nunnehi, to be half-fleshed, making themselves natives enough. It was the Moon-Eyed people, in their chalk-white skins, who built the barriers between the worlds, built them with their own black bones. To them it was as if the inmates had become the jailers.
The Cherokee will also tell you that they drove the Moon-Eyed people away, for though they were half-fleshed, they were still too much of the other world. The other tribes say that the Cherokee simply wanted a land without Changelings.
When the white man came those who knew called the Nunnehi Faeries. Among them were they who had lost sons and daughters to the fae, replaced with aging Others, left to be cared for until they sickened and died. The knowingly cuckolded sought knowledge of these creatures, knowledge and vengeance. Today they are called the Iron Mountain Recompense.
The miners built the tunnels for what they could take out, but the Iron Mountain Recompense used them for what they could hide from mortal eyes. In the darkness they bound otherworldly prisoners, and Cold Iron sigils. Their work created the reverse of a summoning circle; a ring of protection from what dwells beneath and beyond. No child is stolen to make way for a Changeling in the land claimed by the Iron, for the impostor cannot be brought through. Only the Fetchkind can replaced those who are taken, made in this world by otherworldly magic, and, more often than not, it is the Fetch who do the taking.