Out of the Abyss is a campaign that takes place almost entirely in the underdark, a massively expansive cave system below the surface of Fearune. The campaign will include a number of dark claustrophobic spaces, as well as creatures and demons seeking to ambush the party in the darkness as they try to find a way back to the surface to speak with the king of Gauntlgrym about what they find below.
This campaign is highly recommended to have some experience with the game as it is mostly a sandbox and access to goods and civilization will be severely limited.