Ok. So here's the really short version.
There was a slave uprising in Menzoberanzan, the surviving members of the house (the PC's) flee into the underdark and head to Skullport.
In Skullport we met with Lady Yssiriryl who used a scrying glass to show us Kurgoth's arena in Maermydra. Lady Yssiriryl's weaponmaster was dragged through the mirror by Kurgoth, the mirror was broken and we had to fight the glabrezu trapped in the mirror.
After that, we decide to raise money by putting a (former) PC into an arena battle. We get suckered into putting Dariel up against a high-level dwarven paladin.
Dariel loses.
In the ensuing chaos, we steal on the order of 1/2 Million GP and head off towards Szith Morcane.
We arrive in S.M. and find that Irae's daughter Dorina has taken over and intends to convert us all to servants of Kiransalee so we can help Irae bring about the Graverending (ritual to animate vast numbers of undead and wipe out all life on Toril).
We explore the noble level and find the spirit (Banshee) of Matron Alisanarra Morcane. She wails. Carcelon saves, Matron Ki'Willis doesn't. Alisanarra reanimates and co-habits Ki'Willis's remains as a Revenant bent on destroying Irae.
Not wanting to convert, we wipe out Dorina and her supporters and take over S.M.
While preparing to head towards Maermydra we're attacked by a balor (one of Kurgoth's lieutenants) who summons another balor for aid and half the party is killed.