'Tis the Season to be Bloody

From publisher blurb:

You'd better watch out, you'd better not die, there's no doubt, I'm telling you why... Santy and Missy Towe are coming to town! While that may not have a great rhythm to it, such trivialities won't matter much once the blood starts flowing.

This PDF mini-supplement offers:

Advice for creating and running Christmas-themed flicks
Write-ups for a tandem of particularly deranged psycho killers: Santy and Missy Towe.
A seed for a flick featuring the aforementioned killers, wherein the victims are trapped in a department store after hours on Christmas Eve while Santy and Missy hunt them down.