Plague-Mort, the Gate-town to the Abyss, is a collection of shacks, kips, and ruins huddled about the shining silver tower where the Burg's ruler, the Arch-Lector Byrri Yarmoril, holds court. The portal to the Abyss is in the tower; it leads near the town of Broken Reach in the Plain of Infinite Portals.
Plague-Mort is dingy, dangerous, diseased, and full of evil humanoids as well as Tanar'ri. Despite this, the town is a fairly popular spot for those intending to trade with the Abyss or other Lower Planes. Perhaps the portal convenient, or the taxes are low. Byrri Yarmoril, a Tiefling priest of some secretive and destructive goddess, is eager for visitors.
Every Arch-Lector Plague-Mort has ever had has pledged to deliver the town to the Abyss, and all of them - save one, who according to local legend was the Lady of Pain herself - has fulfilled that promise. Most think the loss of this version of Plague-Mort is only a matter of time.