In the first leg of the adventure, the Nine Kingdoms are briefly touched on as being thousands of miles west of Khorvaire and the rest of the canon Eberron world. This adventure takes place in Octavia, the Eighth Kingdom, primarily dominated by water. These Nine Kingdoms are part of a larger Empire, ruled over by Augustus, the Iron Emperor. Beneath the Emperor are his Lords Cardinal, followed by particular rulers of given kingdoms. The primary differences are that the Nine Kingdoms worship the 3.5 D&D deities, and there are few if any references to the daelker.
The PC’s are a group of pirates who’ve been captured on a small island. Lord Cardinal Cyrinnius the Archmage has been named the new governor of Octavia, replacing the previous senate-style government. Cyrinnius makes the PC’s an offer: locate a special artifact and turn it over to him, and he will set them free. Otherwise they hang at dawn. After Cyrinnius departs, a pirate captain in the next cell makes them a counter-offer. If they will help him recover his ship from the Imperial troops, he will help them recover the artifact and keep it away
The PC’s accept the Captain’s offer, and embark on a whirlwind adventure that takes them across the high seas, onto a jungle prison island, beneath the ocean in a forbidden temple, and aloft on a dragon. After a final quest through a mountain temple, the crew gains access to an airship and pursues Cyrinnius, leading to an all-out melee in the clouds, resulting in Cyrinnius’ death and the recovery of the Platinum Trident
The crew then agrees to foment rebellion within the Empire by attacking Imperial vessels and looting them blind.