Bethesda Softworks and Arkane Studios did not bother with the demo version of Dishonored 2 (especially since they are struggling to prepare for the May release of Prey) and instead decided to launch a so-called "free trial" in which users of PlayStation 4, Xbox One and PC can Personally check out the initial part of the game.
To be more precise, from April 6, a trial version of Dishonored 2 can be downloaded from the PlayStation Store, Xbox Games Store, and Steam. There you will find the first three missions available for passage through as a Corvo Attano, though on behalf of Emily Caldwin.
Of course, if you then plan to spend money on a full-fledged Dishonored 2, then all your savings will stay in place, which means you can continue playing exactly from the same place where you left off.