A newlywed couple, Jacob and Alexa, arrive at a small mining town to visit a fabled ancient castle standing on its outskirts.
Soon after, the same town is visited by Keri – a policewoman who recently received a mysterious letter from her childhood friend.
Captured by the rural serenity, they are unaware of the malign curse festering in the soil, decaying the buildings and minds of the people living inside them.
However, a series of seemingly unrelated ghastly events quickly spiral out of control, bringing corruption into the open.
Now they must struggle to keep their lives and sanity intact or be transformed and join the ravenous ranks of the Eldritch Beasts.