The Witcher 3 follows the story of Geralt of Rivia, a Witcher or monster slayer in search of his adoptive daugter Cirllia. (well it’s not his story but we see the story through his eyes!). Set in a medieval world - after an event called the conjunction of spheres - magic and monsters (werewolves, spectres, vampire and the like.) roam the world. Witchers are magically and genetically enhanced humans that were created intentionally by sorcerers to help fight off these monsters.