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.