Stories will be a part of Forza Horizon 4.
Microsoft started off E3 2018 with a bang, taking the wraps off of the latest entry in its Forza series called Forza Horizon 4. The game takes place in Britain and features numerous enhancements over its predecessor. One of the upcoming changes is "Horizon Stories". They're narrative-based sections which require you to become a stunt driver or operate a taxi company.
Full story from the WindowsCentral blog...