Curse of the Witch Queen

The party wakes on a small sailing boat with no recollection as to how they got there. A fog surrounds the boat. Through the fog comes the bewitching song of a siren...

Take a voyage to the island of Alytheon, cursed to be lost to the world by its witch queen Calyphra. Can the party of brave adventurers break the enchantment? Or is Alytheon fated to be shrouded in mist and legend forever?