This one is quite interesting, and we've our main cast who seem to be at odds, and now something otherworldly has happened to one of our characters.
So are characters now are learning of the Lore to this story unfolding, and just what it may require of them to put in to solve their current situation. I really did enjoy the storyline to this film, and it felt familiar and still somewhat fresh, which isn't an easy thing to do.
Luckily, with folklore, you can tell a new version to an old tale or be truly creative and design your own storyline from a rich culture filled with Lore.