Through Abstergo a company that creates a revolutionary technology that unlocks his genetic memories, Callum Lynch (Michael Fassbender) experiences the memories of his ancestor, Aguilar de Nerha (Aguilar Of Nerha), in 15th Century Spain. Callum discovers he is descended from a mysterious secret society, the Assassins and Templars, and amasses incredible knowledge and skills to take on the oppressive and powerful Templar organization in the present day.