The Eastern Plains is a story set in a fictional region with "medieval" circumstances. If you want an easy comparison, you could think of LotR, Eragon or maybe even THG, although hopefully it isn't too similar.
The story follows the adventures of an elf boy and a human girl, both born in complicated circumstances. Don't expect an extremely romantic story though! ;)
I won't give too many spoilers. After all, the best way to find out more is to read the story!
Edit: I have now drawn a quick sketch of a map. It doesn't look great, but it gives you some insight into the locations of all these places, You'll find it as an added image with every chapter from chapter 4 and further.
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.