The expansion includes new items, quests, and a new class, the shaman.
Baldur’s Gate: Siege of Dragonspear takes place after Sarevok has been dealt with. A new threat has appeared in the north in the form of The Shining Lady, a mysterious woman leading an crusader army that has been forcibly conscripting citizens into service and confiscating supplies. “The closer you get to the Shining Lady, the more you realize your father, the dead Lord of Murder still casts a long shadow upon your path. Baldur’s Gate has put its faith in you, but you must determine whose interests you truly serve before you face the Shining Lady among the ruins of Dragonspear Castle…”