Eberron.
Chapter 1: Noire mystery murder.
Chapter 2: Connects the dots and you learn a plot by the witch queen, head of the Emerald claw. You work on finding their agent and defeating the plot against a Breland scientist that is working on a way to counter the effects in the Mournland.
Chapter 3: you learn of the plot hatching in the Mournland to expand the destruction into Breland, you now have to explore the mists, and the genre slightly changes from mystery to horror. Find the base, learn that the Emerald Queen is behind all of this, and has to be stopped as she gained some method to continue. End of chapter you capture a skyship. This ship serves as quest hub and companion gathering place.
Chapter 4: Diplomacy. You need to go around to the Government and convince them into an alliance to stop the Emerald Queen (Big open world quests that you can do to convince each government of what is happening. Gives that Baldurs gate exploring freedom.
Chapter 5: Taking down the Emerald Queen.
