From the Back of the Book:
Beyond the pristine facade of the Temple of Mystra, a sinister conspiracy threatens the future of Cormyr. Profane acts within the temple hearken to a mounting threat in the Vast Swamp. Adventurers must cross into the Plane of Shadow to unlock the truth about this growing darkness in time to thwart an attack against Cormyr and the goddess of magic herself.
This Forgotten Realms campaign adventure is designed for characters of levels 4-7. It can be played as a stand-alone adventure or as the first adventure in a three-part series. Each encounter contains special tactical information for the Dungeon Master and expanded map features for ease of play.