Assassin's Creed IV: Black Flag, like any other Assassin Game tells the secret story, the true story behind events of our history that shaped the world. Behind the War between English and Spanish, between Empires and Pirates there was also the secret war between Templars and Assassins.
In Assassin's Creed IV: Black Flag, Templars are looking for a mysterious place that, as rumors say, could give them a strong advantage against their eternal enemies, the Assassins, in order to achieve their goal of human domination. But Assassins are everywhere and they'll carefully make sure that such a plan is not realized. Edward will be their more important asset to do so.