The story of the game takes place in the industrial city of Dunwall, that was modeled after late 19th century London and Edinburgh. The city is ruled by an oppressive regime. In Dunwall, technology and magical forces coexist and the main hero of the story is a living example of this rule. Players take the role of Corvo Atano, the Empress' legendary bodyguard. After being framed for the murder of his former employee, he is offered the chance to exact vengeance against the Lord Regent and others responsible by The Outsider. The Outsider grants Corvo its mark, imbuing the disgraced bodyguard with magical abilities.