Bethesda released the first in a series of three animated shorts that are narrated by Chloë Grace Mortez (Kick Ass), and provide us with some of the backstory to Dunwall - city where you will apply your trade as an assassin in Dishonored.
"Taken as a whole this is something rare: DLC that adds and builds on the experience in the main game, while still providing a storyline that works on its own."