Buffy the Vampire Slayer: Halloween

A Vampire film's Buffy fighting Spike. Buffy goes on a date with Angel, but someone gets in there before she does. Xander gets questioned by Larry about his relationship with Buffy. Later Buffy and Willow sneak into Giles' personal watcher files, to find some more information about Angel. There is something odd about the costumes that are being hired from "Ethan's costume shop", People act the part of the costume. What happens to Buffy when she no longer has her slaying powers? Is Spike able to get to her in time to kill her? Can Giles save her from death once again?