Tales of the Sword Coast takes place around the same time as the original game and within the same region of Faerûn, adding a number of new locations — the small town of Ulgoth's Beard, a mysterious island in the Trackless Sea, the Isle of Ice, and the ruins of Durlag's Tower. While the expansion brings additional side quests, they don't affect the original game's main story, especially while it's still ongoing.