OK. So people get possessed by evil spirits in Halloween...and what? Do the vampires come and save the day??? In fear of asking a technical English question, how's the conflict resolved?
Not necessarily "evil" spirits, just Halloween ones. Mischievous types mostly.
As for resolution, the final decision would be up to the story writers, but I was thinking something Ghost Buster-ish...spirits collected and sent back into the Halloween world.
I was never a fan of the vampire bit, so that never came up in my idea.