Monsters are overrunning Equestria. Creatures of unknown origins roam the lands, killing innocent ponies.

After taking a seemingly simple contract, Geralt of Rivia finds himself in an unfamiliar land of talking ponies. And very familiar monsters. As he discovers more and more about this land it seems a mysterious enemy is the key to going home.

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Alternate universe because it takes place in an Equestria that Equestria Girls never happened.