Season 9 tied in with not one, but two of WotC's metaplots launched in 2014 and 2015: "Elemental Evil" and "Rage of Demons", respectively.
Story[]
"Playing With Fire"[]
Played live at PAX East 2015. Having arrived to Baldur's Gate safely, Acquisitions Inc. find their local chapterhouse besieged by the Flaming Fist mercenaries and fire demons, and must organize the last ditch defenses to repel an imminent assault by the Elemental Evil. Portentia reveals she's working for Auspicia Dran of Dran Enterprises. Acq Inc goes to the Undermountain and helps Drizzt Do'Urden, who gives them his unicorn.
"Darkmagic vs. Do'Urden"[]
Played live at PAX Prime 2015. In preparation for Acquisitions Inc.'s merger with the Dran Enterprises, the latter's CEO (and Omin's sister) decides to evaluate the party's performance by sending them into the Underdark to deal with Drizzt Do'Urden, who had lost his mind to a demonic Hate Plague.