Set post season 7 BTVS, and re-writing season 5 of AtS.
Buffy, Faith and the Scoobies escaped Sunnydale as it collapsed, creating another "grand canyon". They then split up Faith and Kennedy went to Angel, who is now running W&H for a place to stay and to help with any up coming apocalypses. The others went with Principal Wood to set up a secondary base of operations.