The latest add-on puts players in the shoes of assassin Daud during the moments he kicks the story's plot in motion.
Source: Bethesda Blog
Dishonored will return to the beginning of it's story to fill in some of the mysterious origin. Players will assume the role of Daud, legendary assassin, whose elimination of a key figure in Dunwall sets the story into motion. After the murder, Daud is visited by supernatural entity The Outsider. He will explore new districts of Dunwall as he searches for Delilah, a name new to players. He will also have new weapons and powers, the full release from Bethesda is below:
New Powers, Weapons and Gadgets – The mark of the Outsider empowers you with unique supernatural abilities. Call upon the Whalers to assist in combat with ‘Summon Assassin’, track down hidden Runes and Bone Charms with ‘Void Gaze’ and learn to use new variations to powers, including ‘Blink’. To aid in your dangerous exploits your customized arsenal of weapons and gadgets will include Chokedust to daze your enemies, whale oil powered Stun Mines to shock your targets, and a concealed Wristbow to launch sleep darts and explosive bolts.
Explore More of Dunwall –Make your way through the Legal District and infiltrate the Rothwild Slaughterhouse, a steaming factory filled with colossal whale carcasses and their hulking butchers. Revisit the decaying Flooded District, the location of Daud’s hidden base, first seen in the original game. Return to the scenes of key events in Dishonored with a new perspective, including the fateful moment that sets off Corvo’s journey.
Choose Your Path – On your search for answers, approach each mission with your own style. Your redemption – or your turn towards darkness – depends on your skills and the decisions you make. Discover the mystery behind Delilah in this stand-alone chapter, and then conclude Daud’s story in the upcoming final add-on, The Brigmore Witches.