Christopher Clark's Rain of Terror

From publisher blurb: For the residents of the Riotous Vale, it has been an unfortunate decade. Ten years ago, a pirate band destroyed the keep that protected them, captured their town and laid waste to the fertile valley beyond. The pirates tortured, terrorized and enslaved the few survivors. But they overlooked the treasures that lay beneath the ruins of the keep. That was their first mistake. Their second was allowing the man that built the keep to fall into your hands. Perhaps their last mistake will involve a group of clever adventurers spiriting away the treasures from beneath the ruined keep right under their very noses. Rain of Terror is a fight against two forces, a cutthroat pirate band, and an approaching hurricane that will test the survival skills of your players to their utmost. It is designed for exploration by 3 or more well-equipped characters of low to moderate level supported by both clerical and magical assistance. It is written in a generic language to allow its use with almost any fantasy role playing system. Let's hope they can swim.