Seth is an aspiring sorcerer from the Pompo Hills area. Like all wizards, he is an "infected," one of the few living beings who survived the contact of the Nemesis-creatures fallen from the sky that contaminate and decimate all those they touch. Being immune to them, Seth wants to become a Hunter and fight the Nemesis. But more than that, Seth wants to engage in a quest that goes beyond the simple hunt for monsters. He wants to find the Radiant, their presumed cradle. Aided by a faction of fellow sorcerers, he travels the world in search of the Radiant, under the harsh scrutiny of the Inquisition.