The party returned to the beach to find their ship was gone. Questioning the tentacled mutant, whose name is Kragan, the party learned little other than he served a Prophet (Arnes) and the goddess Zeboim. In the morning, however, the captive was a bit more open with Galdar when he learned that Galdar had slain Arkush, the captain of Zeboim's Wake. Turns out Arkush had bought Kragan and the other some-day mutants as slaves and brought them to this island to build a pirate base. Arnes drove Arkush away, and the man never returned. Kragan gave Galdar his word that he would take the party to Arnes and not attack them.
He led the group back to the spire, and they descended into the (seemingly literal) bowels of the island. There, they found Arnes by a pool of some strange, black fluid that seemed to be the source of the evil on the island. The man had been transformed into a bloated, slug-like aberration. Arnes had captured Zeboim's Wake and now offered the party a deal: transport him and his followers to Kalaman and let them go free. In return, Arnes would direct a powerful storm sent in a month's time by Zeboim. He would ensure it only destroyed parts of the city rather than the whole, saving thousands of lives. Galdar, tired of making compromises with evil, refused, and a fight ensued. Kragan, true to his word, did not fight, but simply blew out the party's lantern and then ran away. Arnes, however, fought to the death, telling Galdar that slaying him would doom thousands to death in the storm. With the killing blow, Arnes' body fell into the pool and disappeared.
The group gathered up a sizable amount of loot from the chamber and then followed the tunnel Kragan had gone down to find a cavern open to the sea in which Zeboim's wake was anchored. Kragan surrendered to the party, asking only that they take his men back to civilization that they might search for a cure to their afflictions. The party agreed and set sail for Kalaman.
Arriving back at the city, the party dispensed of their booty. Galdar then made a trip to the temple of Kiri-Jolith to speak with the high priest, but he was in a meeting of council at the castle. Next, Galdar went to the hospital of Mishakal and asked their help in curing the mutants. Finally, going to the castle, the party spoke with Templar Gareth, high priest of Kiri-Jolith, telling him of the approaching storm and learning that Lord Kransin was being dressed down by his fellows for raiding Zeboim's Wake unlawfully.