The land of Prast, in the country of Forlorn, on the continent of Tertius, was a peaceful place where a lot of magic research happened. Then one of the Deans of a magic college there thought he was better than everyone else and got some guys together to wage war on the world. He performed a ritual called “The Hand of God” and it destroyed nearly the entirety of Prast. He and the party, fighting atop his college at the time, were taken to Ravenloft rather than destroyed by the ritual.
They were all stranded in a Island Domain, called Midrath for the steam-punk inspired city at its center. Some crazy stuff happened, including a bar being destroyed by reading a book, a clone of one of the party members being blamed for burning down a bunch of bars (he hadn’t, he was too busy being fucked by some crazy pants army lady who had created him when she didn’t have the balls to ask the original out on a date) (Don’t ask…), and a church full of INFINITE DEAD BABIES! Eventually the party tracked down the Dean and killed him (Protip: he let it happen).
Then some guy did some really bad stuff and made the party look at it, so they got teleported to the Core Domains. After screwing around in Dementlieu, they left for Mordent, where they hooked back up with the sheriff from Midrath, who wants them to free his boss from Midrath in return for having his boss grant their every wish. The party doesn’t really trust that they’ll be rewarded so they’ve been doing everything to avoid helping the sheriff.