Storm Under the Moonshaes

Publisher's blurb:

The quiet fishing village of Oyster Cove, tucked into a quiet corner of Alaron far away from the capital of Caer Callidyr, seems an unlikely place for a fanatical cult of Umberlee followers to set up operations. But there is more going on in this obscure corner of the Moonshae Isles than meets the eye. In fact, your heroes of Faerûn come to the village at a moment when the cultists are about to destroy the peaceful obscurity in which these fisherfolk have always lived their lives.