Having successfully navigated the goblin-infested cliffs along the river, Goblin Slayer and the others make camp and are come upon by a helmeted elf who turns out to be the High Elf Archer's cousin.

Goblin Slayer and the crew have encountered the Mokele Mubenbe and, much to their surprise, it's being ridden by a goblin. After capturing Mokele Mubenbe Goblin Slayer decides to head upstream in search of the goblins' nest.

While searching the abandoned building, Goblin Slayer and the others come upon a goblin horde led by a shaman presumed to be the one who was controlling Mokele Mubenbe. The adventurers press the attack but are overwhelmed by the shaman's magic.