from the synopsis:
This adventure involves a series of ritualistic murders that lead the characters to a young Wiccan who has been possessed by an ancient and vengeful spirit through a tainted Athamé (dagger used to direct magical energies) she purchased at a second-hand shop. The Monsters of the Week in this episode are both the possessed Wiccan and the re-animated corpse of the dead wizard. Any characters with Psychic Visions will be very useful in this scenario, as will characters with any sort of street contacts.
from the introduction:
This Episode is designed to work in conjunction with the Episode contained in the Core Rulebook and Director’s Screen supplements, to help towards a cohesive season.
The scenario is billed as being for "Unisystem Lite", which is Unisystem fan jargon for "Cinematic Unisystem", in this case the presentation is for Buffy the Vampire Slayer.