In this supplement for Tales of Gor you join a rebellious inventor on a quest for a mythical lost island and city. Will his technological innovations anger the Priest Kings? Will you fall afoul of the pirates that ply their trade across the Thassa? What will you discover beneath the waves, far from the politics and skulduggery of Civilised Gor?
This book also contains information on a (non-canonical) Farther Isle for you to use as a setting or base of operations for your player group.