Musketeers, Skyships, Swashbuckers, and Pirates. All of these meet in the port city of Agua Azul on the free cloud island Crail.
When a mysterious artifact is brought in to the port , The Falcons of Agua Azul must track down the conspiracy looking to destroy the city. Could it be a super weapon left over from a people long forgotten ? an assasin's cache in a plot to kill the commandant and plunge the city into disorder?
Either way a motley crew of miscreants / musketeers or municpal employees must solve this riddle.