Publisher's blurb: The heroes of Elmwood find clues that lead them to follow the trail of their adversaries to the Bell of the Deep, the sunken castle of Northkeep beneath the violet waves of the Moonsea. Can they make it safely there through the ancient terrors of the Moonsea as well as all the obstacles their adversaries can put in the way? A four-hour adventure for 5th - 10th level characters