The Dark Stalkers of Faerun
The city sewers of Baldur’s Gate are vast and dangerous. Recently, The Dark Stalkers were coereced into smuggling “medicine” into Baldur’s Gate via the sewers. The used an outflow gate that dumped directly into the river south of the city wall. In the sewers they found many central dumping vats, sluices, locks and even a few boats that allowed them to navigate through the maze like passages. The sewers of Baldur’s Gate contain many living things such as giant toads of various genus, cloak wings, and even a Banderhobb. Also, in the sewers, the Dark Stalkers discovered a stuck giant tortoise named Mephisto who is able to speak common yet can’t quite remember a lot about his past. The Dark Stalkers helped Mephisto escape the sewer pool he was in and also removed a powerful sword from his carapace which was lodged in his back.
The party found that there is at least one way to enter the city proper via the sewer tunnels but it is watched by the shadow thieves.