From the publisher's website:
While on a routine mission to escort a dignitary to the mysterious Mordant Spire aboard a disreputable smuggler's ship, the PCs find themselves embroiled in a murder mystery that could jeopardize the Pathfinder Society's relationship with the isolationist elves who call the citadel home. Can the cunning Pathfinders discover who among the ship's crew of scum and villains is responsible for the crime in time to clear their own names? This murder mystery upon the open sea features a mechanic allowing for a different killer each time it's run to ensure that no amount of word of mouth will spoil the investigation for any team of canny players.
A Pathfinder Society Scenario designed for 1st to 5th level characters (Tiers: 1-2 and 4-5).
This scenario is designed for play in Pathfinder Society Organized Play, but can easily be adapted for use with any world. This scenario is compliant with the Open Game License (OGL) and is suitable for use with the Pathfinder Roleplaying Game.