Into the Unknown (5E)

From the introduction:

Travel south into the goblin kingdoms is always frought with danger. So many will go only as far as the Baron's outpost, the Vakhund, the Tower of the Dog, and reside there in safety while merchants and others fare their way further down the road. But what happens when the Vakhund is attacked by goblins, orcs and bandits? A princess is kidnaped and only a dangerous trip into the dark, infested goblin kingdoms will reveal the answer.