Inside-out Episode III: Storm's Depths

From Introduction:

The annihilation of Varna Biqua has left no doubt that there are capital ships hidden in the clouds of Genarius. The question is, where? The abandoned city of Nub Saar, shrouded in continuous ion storms for the last ten months, seems to hold the answer. While there are two Thaereian capital ships docked there, the crews are missing. It is up to the heroes of Cularin to discover what happened – and, if possible, to retrieve the ships for the coming war.