Goblin Slayer

Synopsis

Ten years ago, a group of Heroes (including Sword Maiden) slew the original Demon Lord. Currently, in another part of the world, the new Hero and her companions slay the resurrected Demon Lord and crush his army, though some generals remain on the loose. Goblin Slayer and the rest of the party journey to Water Town, where they meet Sword Maiden, now retired. Sword Maiden informs them there have been a string of violent murders in the town recently, and they suspect the culprits are goblins in the town's sewer system. Since the army won't mobilize to fight goblins and other adventurers have failed, she decided to reach out to Goblin Slayer. Goblin Slayer agrees to the quest and leads the party into the sewers, where they discover the goblins have learned to use boats to navigate the sewers. This puzzles Goblin Slayer as goblins have never been smart enough to use boats before. After sinking a goblin boat, the party attracts the attention of a giant alligator, which they take advantage of by tricking it into destroying the rest of the goblin fleet. As they return to the surface, Goblin Slayer is troubled at the fact the goblins knew how to use boats, yet were unaware of the alligator, leading him to conclude somebody had placed the goblins in the sewers.

(Source: Wikipedia)