Aalterdam VIII part 1: City Beneath the Waves (D&D 3.5)

The aristocracy of Aalterdam has been overthrown by a republican government of merchants and exiled to the Western Mountains. In the aftermath of the revolution, a nobleman lost all his lands, money, and possessions except for one strange scroll handed down from his ancestors, which claims to tell the story of Thalasson, an ancient city lost beneath the sea for many generations. Unfortunately, the only person with the skill to interpret his heirloom is a patriotic citizen of the Republic...

A D&D 3.5 adventure for 6 pre-generated characters, focusing on roleplaying, puzzle-solving, and intrigue. This game is part of the Aalterdam series, but no knowledge of the setting is needed or expected; City Beneath the Waves is a complete adventure but also forms a part of a linked two-part adventure with Monarchs of the Sea.