All right, all right, all right.

What? Who’s out there? The Tooth Fairy? Wait … where is she? Darkness Falls? What does she want? Why?

These are some of the questions that nag a viewer throughout “Darkness Falls.” The story goes like this: The town of Darkness Falls is under attack from the ghastly spirit of a woman hung after being wrongly accused of killing two kids. She was known for collecting teeth in exchange for gold coins, and has now terrorized the town for the last 150 years, haunting and killing kids who look at her when she comes for their teeth.

The townspeople have been terrified, injured and killed by this old lady, who still insists on continuing the usual horror plot device: The dead-person’s-unfinished-business-revenge-on-the-living attack.”

And, boy, are the townspeople upset. Though the only message to send them would be: “When you live in a town called something as cryptic as Darkness Falls, what do you expect? Oh, and your town has been plagued by an unstoppable terror — what are you still doing there?”

The ghost is the Tooth Fairy. The Tooth Fairy! Such a treasured cultural icon!

But, oh well, let’s face it, there aren’t that many cool horror antagonists left. There have been alien invaders, the devil, monsters, the dead, the half-dead, the back-from-the-dead. Hell, they’ve even used snowmen and stuffed animals.

So the “plot” unfolds and all these fun, long and actually scary chase scenes start as the stock characters get together — there’s the heroic, handsome, mysterious ex-boyfriend with a secret, the confused police and the skeptical townspeople.

Most are killed, but the three (re)main(ing) ones — a troubled little kid, his older sister and her old sweetheart, who has been haunted by the ghost his whole life — keep getting stuck in the dark. First, they’re in a hospital — where when the power goes out, the lights go off, yet the elevator still works — and then in a lighthouse — where the smoking-hot older sister has somehow changed into tight jeans and a skimpy top, the official outerwear of female horror movie victims everywhere.

Then the older sister (played by Emma Caulfield) gives Kyle (the haunted kid) a pretty convincing “horror-movie-booty-look,” a subtle wink-nod-smile that lets him know that if he can stay alive for the next 10 minutes, he will definitely get laid.

Overall, Caulfield’s acting wasn’t as bad as it could have been. She wasn’t great, but definitely good enough for this horror movie. However, when one is as cute as Emma Caulfield but has as little acting ability as her, “Playboy” is the only place for one to go.

Anyway, they’re trapped, and the old lady won’t let up, even though she’s been killing for 150 years. (150 years? Why so mad still, Matilda? What’s done is done. Let it go. These people weren’t even born when you were wronged. And, seriously, is this a wise post-life choice? Think of all the things to do after death, when there’s no need to eat, or sleep, or go to work.) But, hey, it’s her choice.

So they’re trapped, they escape. Chase scene. They’re trapped, they escape. Chase scene. I won’t spoil the end, though you can probably already guess who wins and what happens.

But however corny and predictable the story is, it’s a horror movie; a genre where the only yardstick of success is how scary the special effects can make it. Truthfully, everyone in the theater was scared. People were jumping out of their seats, time after time, laughing collectively as the ghost left, and unclenching their fingers, heaving sighs of relief.

That’s what a horror movie is supposed to do, and the more refined the special effects get — like they have been for this movie — the easier they are to make entertaining, good plot or not (good acting or acting like whoever played the haunted ex-sweetheart).

Horror movies are a lot like pop music: If one doesn’t think too hard, and doesn’t look for all the mistakes and inconsistencies present in every one from “Hellraiser” to “Darkness Falls,” they’re easy to enjoy.