The first book follows Raelynn (ngl almost stopped reading just because of that name) who moves back to her home town to finish college. I will say I don’t think the author really understood how college worked and seemed more like high school (transfer to an entirely new school her senior year??!) but it didn’t really matter it was just so there could be a story. The town is full of seemingly normal people but actually many of them belong to a cult which worships an old god called the deep one (basically Cthulhu its just Cthulhu). 6 generations ago there was a horrible flood and collapse in one of the mines and only 3 men made it out alive by the grace of the deep one and now the cult must sacrifice a descendent of each man in order to fully awaken the god. Surprise of all surprises Raelynn is one of those dependents. She also catches the eye of a demon, Leon, who is the trapped servant of the cult leader. He eventually gets free and they have kinky kinky sex while trying to decide if they trust each other/ actually maybe have feelings for each other.