Buffy the Vampire Slayer: Haunted

It's only been a couple days since graduation, Buffy's lost Angel, and now she's losing two of her best friends. Cordelia is moving to L.A. to become an actress and Xander's getting ready to depart for parts unknown. The whole Scooby gang has to deal with all this emotional junk. Meanwhile, signs of Faith stir among the charred rubble of what used to be Sunnydale High. It seems that the ghost of one of Buffy's recently deceased enemies has a bone to pick with her. How can Buffy kill something that's already dead?