Goblin Slayer and his party go into the sewers of Water Town to investigate some brutal incidents they think were caused by goblins. When they go down to the sewers, they are immediately attacked by a horde of goblins. Because of the sheer number of goblins, the party has a hard time dealing with them all and then a goblin champion also appears before them...

Goblin Slayer was gravely injured after the battle with the goblin champion. The Priestess and Sword Maiden work together to heal Goblin Slayer with a special ritual. Meanwhile, High Elf Archer and the others investigate the sewers a bit further and encounter a mysterious creature. Due to the creature's abilities, the party heads back up to the surface to regroup with Goblin Slayer and Priestess before they go any further.

Episode 10.5 - Recap of the first 10 episodes.

The Cow Girl waits for Goblin Slayer to come back home and reflects on his childhood and his interactions with his new companions. We get to see why the Silver-ranked Goblin Slayer slays goblins through the Cow Girl's eyes.

The party arrives at the capital and splits ways. The girls go to a public bath and as they're about to leave, they find that Priestess's belongings have been stolen.