Plot DNA

What it measures

Continuity asks whether the facts of your book agree with each other. Plot DNA asks a different question: is the book actually moving? You can write a hundred thousand words where every name is spelled right and every timeline lines up, and still have a story that idles for forty pages in the middle. Plot DNA is the part of StoryHelm that reads the shape of the motion, scene by scene, so a slack stretch shows up as a measurement and not just a nagging feeling.

It reads the manuscript you import and reports what each scene is carrying, so you can decide where to cut, where to compress, and where to push harder.

For every scene, and for the book as a whole, Plot DNA records a handful of measures:

• Intensity: how much pressure the scene puts on the page. A quiet kitchen conversation and a rooftop standoff sit at opposite ends, and the rhythm between them is what readers feel as pace.
• Stakes: what stands to be won or lost, and how much of it the scene puts at risk. A scene can be loud and still cost the characters nothing.
• Beats: which structural beat each scene lines up with, judged by its position in the book against a template such as the Hero's Journey. The Structure page flags a beat it cannot find. It does not read the turns inside a scene, so a scene where nothing changes is still yours to spot.
• Thread coverage: which named characters, places, objects, factions, and events each scene brings in. A name that builds up and then vanishes, or goes quiet for four or more scenes in a row, is flagged. See thread coverage for how this is tracked across the book.
• Filler ratio: the share of the book's scenes that score low on both intensity and stakes, shown beside a suggested range for your genre, which is an editorial guideline rather than a measured norm. The score does not look for weather, throat-clearing or a third conversation that lands where the first two already did; the page lists the low scorers by name so you can reread them.

Per scene and per book

Within a single book, Plot DNA gives you a profile of every scene laid end to end, so you can see the tension curve of the whole manuscript at a glance. Across a series of two or more books, the series Books & order page overlays each book's tension curve and names the book whose middle sags most, which is where the Series Craft question begins: whether each book earns its place, whether Book Three opens with momentum or coasts on Book Two's, whether your finale raises the stakes or only the volume. Scenes are scored when you import a book, on every plan. A scene you write in StoryHelm is scored from its summary rather than its prose, and revising a scene's text does not update its score.

How it surfaces the sagging middle

The opening has its hook and the ending has its payoff, but the long stretch between them is where scenes start to repeat themselves, threads go quiet, and intensity settles into a flat run. Most authors can feel the slack on a reread without being able to name the scene that broke. Plot DNA puts a number on every scene.

Plot DNA does not tell you which scene to cut. It shows you the middle run scoring low and names the scenes that read as filler. The cut is yours. Finding the stretch is the part that used to take a hard reread or a sharp beta reader, and now arrives with the location attached.