The story is whatever and the voice acting is still bad in an almost endearing way (I salute you, guy who voiced Duke Abele), but really you're here for the level design both aesthetically and mechanically.

The Clockwork Mansion is the obvious stand-out here, but Serkonos is a great place to explore overall.

You can tell the designers took the complaints about low chaos runs forbidding you from a lot of toys to heart and they give Emily a lot of fun non-lethal tools to use.