The year is 1715. Pirates rule the Caribbean and have established their own lawless Republic where corruption, greediness and cruelty are commonplace. Among these outlaws is a brash young and selfish Welsh captain named Edward Kenway. Kenway joins with Blackbeard and other legends of the sea to become the bane of Templars and the enemy of empires.
Meanwhile in the present Desmond Miles, one of the last Assassins, is dead. And the Templars control more than ever. And little does either side know that a chain of events more dangerous than their petty thousand year feud has been set in motion.
The importance of the past will shape the future and quite possibly even save the world from the most dangerous adversary of all, Juno the godlike being from an ancient age. The Templars and Assassins will have to forget their quarrel and stand together. But will they be able to let go of the past.