Spike has to reconcile his feelings for his Sire and his feelings for Buffy and the Scooby Gang. Where does he belong these days? What does he want?
Buffybot has left the mausoleum so that she won't interact with the "other Buffy", but where does she go now? Hey, what about the Magic Box?!
The Slayer has to deal with one vampire, before she can deal with another and her day just gets worse from there after she returns home.