It's based off of bad short stories. There was one starring Brandon Routh about vampires that they decided to cut. It explained a lot of the connection between the characters. Like the guy that comes to the door to get the kid and Brad Renfro tells him that the kid isn't there. That guy was a vampire.
When you're forced to write vampires into your collection about 1980's excess and struggle pieces you've got to at least realize that your words have a big possibility of being crap.
At least you get to see Amber Heard naked, a lot.