Layered over the historical fiction is a sci-fi element: The main character is a modern-day barman, Desmond Miles, who is forced to travel through time to relive the story of his ancestors and collect artefacts.

BBC: Michael Fassbender

Of course, the conceit of the AC series has always been that you're a modern man named Desmond Miles, a member of the ancient Assassin's Guild, and that you're experiencing your assassin lineage through a machine called the "Animus" in order to save the world.

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