 Using a captured Ottoman cannon , Morgan and Alain then drive the Ottomans from Malta and detonate Ottoman weapon caches in the nearby caves . Inside , they discover that the Ottomans were really interested in a hidden stone library telling the story of the Lake of the Moon , which contains the Fountain of Youth , a secret Native American relic which is told that it has the ability to give eternal life , and the secret society , called the Circle of Ossus , who seek it for their own gain . Alain orders Morgan to sail to the New World to search for the Lake , but Morgan is attacked by the Pirate <unk> Ramsey ( Lizzie the Pirate ) and is forced to land in the Caribbean islands . After re @-@ engaging and defeating Lizzie , Morgan 's men find some navigation charts which guide them safely to New Spain . 
