As taken from IMDb:
"More than 300 years ago, 3 witches were sentenced to die in Salem, Massachusetts and a boy was turned into a cat (a black cat, naturally). Now it's Halloween, and the witches (who fly on [I kid you not] vacuum cleaners) are back. This time, they've got their eyes on immortal life and have turned their wrath on trick-or-treaters and it's up to the 300-year-old cat to save the day."
I put a spell on you...and now you're mine!