From the publisher's website:
Iridonian Darkness is a new full-length Star Wars adventure, set in the Knights of the Old Republic era. In the early days of the Jedi Civil War, the heroes are helping to combat Mandalorian mercenaries on the Zabrak homeworld of Iridonia. They are aided by the Jedi Duqua Dar, but other forces acting behind the scenes have bigger plans for Dar, who soon becomes caught in a struggle between the light side and the dark side. Can the heroes discover the secret plot in time to redeem the wavering Jedi?
This adventure is designed for four to six 5th-level characters and takes place during the Knights of the Old Republic Era. GMs will need both the KOTOR Campaign Guide as well as the Saga Edition Core Rulebook in order to properly run this adventure. The adventure itself was available for free from the WOTC website, but is no longer there since the series was canceled.