The Assassins Four

Murder is not uncommon in Dunwall, and politically motivated assassinations are rife. The player characters are asked by a member of the Bottle Street Gang, who would be falsely framed for these murders, to track down and kill four assassins before they can claim their target.

No previous experience or knowledge of the world needed. I will go over everything on the day and provide pregens. 

Dishonored uses the Modiphius 2d20  system and has mechanics for altering truths about scenes.