After killing a group of
goblins, the young man just starting to make a name for himself as Goblin Slayer
finds a ring that emits a strange glow. In order to make sense of this item,
he's introduced to an eccentric Arch-Mage, who then employs him in her quest to
update the world's encyclopedia of monsters - starting with the entry on
goblins. She and the young Goblin Slayer travel to the ends of the earth to
gather information, and eventually reach an ominous dark
tower...