Abraxas clanster Jonathan stumbles upon a skeleton key he believes was part of someone's Halloween costume. What it really winds up being is a demon's not-so-subtle way of getting Jonathan to do his dirty work for him. Jonathan's wishes start to give his Clan more headache and hassle than the 'fun' he hoped they would, as fellow trick-or-treaters and party-goers start becoming the things they're dressed up as---with horrifying results...and much MUCH worse...