How do you plot a horror story?

Horror is my preferred genre to write in, so I absolutely understand the conflict between the idea in your head and the execution. For me, I think that the main issue is that I get in my own head about what constitutes ‌true horror. Fear is so subjective, so I often second-guess myself about whether readers will respond to what I’m putting down in the way that I want them to. And as soon as that doubt starts to creep in, then it’s hard to really commit to the plot the way I easily can with other genres.

Knowing that you struggle with plot in a genre is actually an amazing self-awareness to possess. But it’s both a blessing and a curse, because with it comes expectation. If you know where you lack, you need to know how to overcome it, and that’s the bit that can lead to creative blocks. Basically, we need to get out of our own heads. We need to believe in our characters, setting, concept, and atmosphere and trust that readers will follow us on the journey. They may not share your fear, but it’s up to us as writers to convey how the fear of it affects us.

Premise isn’t plot

It’s easy to fall into the trap of thinking you’ve got a story because you’ve come up with an idea that you love. But as you’ve discovered, the idea isn’t enough to carry a story. A premise tells you what your story is about, but the plot is what makes it tick. 

A lot of other genres make you tackle the plot question early because they don’t function without it at all. A romance without escalating obstacles, or a mystery without a chain of clues simply won’t function as a narrative. But horror, on the other hand, lets you get away with relying on just the premise for far longer. Atmosphere does a lot of the heavy lifting, especially early on, so readers (and, as a consequence, writers) have a lot more tolerance for the story to take its time. The events inside a haunted house, or some unsettling exchanges can read as a lot more finished than they actually are, because it draws you in without anything actually having happened yet.

With horror, the trap is falling for your premise absolutely, without committing to making it an experience for the reader. You can describe dread and build an atmosphere. But as you’ve so rightly said, you can’t sustain a whole narrative on it. At some point, all the atmosphere has to lead to something. Your premise is the starting point, but you still need your plot to have forward motion.

Give fear a job to do

A trick I like to use on myself is to start thinking of the fear itself as a character. No matter the source of the fear, whether it’s a literal monster, a haunted object, a curse, or something more ephemerally psychological, treat it like a character with its own goals, motivations, and conflicts. And then think about how that interacts with the goals, motivations, and conflicts of your protagonist.

A strong premise works for you here. If you’ve already thought hard about what form fear will take in your horror story, then you just need to take it that step further. What does the cause of the fear want from your protagonist? What will they do to get it? And what stands in their way?

Borrow from established plots

Underlying every great piece of literature is a plot structure you can learn from. Many have similarities, but not all are the same. But they all have certain paths through the story from which you can learn. Here are two of my favourites:

In his 1990 academic book The Philosophy of Horror: Or, Paradoxes of the Heart, Noël Carrol argues that most horror novels move through four stages: onset (the threat first appears, often to someone who isn't believed), discovery (a character or small group works out what's actually going on), confirmation (that understanding gets proven, often to skeptical others), and confrontation (direct engagement with the threat). 

Blake Snyder's "Monster in the House," from the screenwriting book Save the Cat! treats it as one of ten basic story types, not horror-specific. But most horror fits it for obvious reasons. He argues that the monster-in-the-house type of story needs exactly three ingredients: a Monster (literal or otherwise), a House (a confined space the characters can't easily leave), and a Sin (some transgression that invited the monster in or explains why it's there). This one's popular in screenwriting circles and gets cited in film/TV writers' rooms, but can easily be applied to long and short-form fiction as well.

If you don’t want to follow something pre-defined, you can just read your favourite works of horror and see what beats and structures work for them. Take a moment to do a close reading, take notes as you go, and find inspiration from what works and what doesn’t.

Regardless, no plot structure is a set of rules you need to follow exactly. But following someone else’s framework can definitely help if you’re stuck. Picking a shape that feels like it fits with your premise, and applying it to your narrative can often help get things moving, even if you end up diverging as you get into the flow of writing. If you know what impression you want to leave your reader with, it can be easy to find inspiration from the work of others on how to get there.

Find a shape you can test

Once you’ve got a general plot shape and know what takeaway you want your readers to leave with, the actual plotting becomes a matter of sequencing. Every step needs to move the plot forward, whether that be through action or character development. 

A useful habit is to write out the escalation of fear as a list of plot beats. Just list out the potential events (I love a list; it’s the most slept-on tool in a writer's arsenal), and in order to look at the flow and pacing, place those story beats on a Fichtean curve. Essentially, this looks like a wave of rising action, built from a series of crises, that peaks at the climax and then falls as you wind down the plot. This gives you a skeleton from which to work from that has pacing as a fundamental part of the design. 

What about literary horror?

Literary fiction is indeed more character-driven than a lot of genre fiction, but this is also a piece of information that is often misused or misunderstood. It’s popular shorthand, but isn’t precise. 

Literary fiction still has plot, it’s just that the plot is often internal and structural rather than external and event-based. In that way it’s a lot more subtle. It’s true that the characters, their relationships, and their internal lives are more important to the story than the things that happen to them, but that doesn’t mean that plot isn’t important to the genre.

A perfect example of literary horror at play is the the brilliant Our Wives Under the Sea by Julia Armfield. It is a book in which very little happens in the conventional sense, but it’s far from plotless (I can't recommend it enough!). It’s a story about a woman who comes back from a deep-sea expedition fundamentally changed, and her wife has to live with what she’s become and explore what those changes mean for their relationship. It’s a deep exploration of love, loneliness, and grief, and its themes are very much what carries the book. The characters are the plot, but there are no neat resolutions. Instead, the novel builds entirely to the feeling it will leave you with.

The important thing to remember is not to fall into the trap of something as character-driven, rather than plot-driven as being without plot. Plot is still very much fundamental to the way that literary fiction unravels. It just does it in a different, less bombastic way than genre fiction might. 

If your instinct is to write character-driven stories over event-driven stories, then give yourself a structure that has forward motion without needing too much external input. You’ll still need structure and plot, but the driver of that plot is internal rather than external. And get used to the idea of letting dread sit unresolved. Literary horror often doesn’t have a monster reveal or have a tidy answer at the end. Because it’s not about the external threat, it’s about the characters and their interiority.