Subplot
Quick answer: What a subplot is and how it serves the main plot: Jane Austen's example, the detachable-subplot test, and how to fit a second storyline into short fiction.
A subplot is a secondary storyline that runs beneath the main plot, smaller in stakes and page count but tied to it by character, cause or theme. In other words, it is a smaller current in the same river, moving the same water toward the same sea.
Novels and novellas live on subplots; films formalise them as the B story; short fiction uses them sparingly and pays for every gram. As a craft concern the subplot belongs to outlining and, even more, to revision, where the question is always the same: what is this second story doing for the first one?
Lydia runs off: a subplot doing real work
Pride and Prejudice keeps its main plot simple, Elizabeth and Darcy misjudging each other toward marriage, and then surrounds it with subplots that all pay in. Jane and Bingley's stalled romance is not decoration: Darcy's interference in it becomes Elizabeth's best evidence against him, and his repair of it becomes his best apology. Lydia's elopement with Wickham looks like a disaster from a different novel until it detonates inside the main plot, exposing Wickham's character and giving Darcy a secret, expensive way to prove his own.
Notice what Austen never does: no subplot idles. Each one generates motive, evidence or obstruction for the central courtship, which is why the book feels dense rather than busy.
Why subplots earn their pages
A subplot controls rhythm, giving readers relief from the main tension without releasing them from the book. It tests the theme in a second key: if the main plot asks whether love survives pride, a subplot can ask whether it survives poverty, and the two answers argue. It also rounds character, showing the protagonist at work while the main plot shows them at home, and it manages time by giving the story somewhere to be while the main plot waits for a letter.
The dangers are bloat and detachability. A subplot that outgrows the main plot signals that you may be writing the wrong book, and one that touches nothing will be the first thing an editor circles.
Fitting a subplot into a short story
At 2,000 words a subplot cannot have its own scenes; it must share them. Give your protagonist a second pressure that leaks into every main-plot moment, a sick dog, a brother who keeps calling, rent due Friday, and let that pressure complicate the climax rather than merely accompany it. Attach the strand at three points: an origin we witness, a complication that crosses the main plot, and a payoff that alters the ending's meaning.
Then apply the detachable-subplot test without mercy: if you can delete the strand and the main plot's events and emotional weight survive intact, delete it. Writory's story judges score Storytelling and Structure partly on this economy, rewarding second strands that pay into the ending instead of padding the middle.
An audit for your own draft
Subplot problems hide in the whole and show up in a list, so make the list. Write one line per scene of your draft and tag each line with the strand it serves: A for the main plot, B and C for the others. The tags expose three faults instantly. Long unbroken runs of A mean your subplot has been abandoned for fifty pages and its return will need reintroduction. A B-strand that never shares a scene with A is drifting toward detachability. And a B-strand with more lines than A means the book has quietly changed its mind about what it is.
The list also reveals the load each subplot carries at the climax. Trace every strand to its endpoint and ask what it delivers there: evidence, an obstacle, a changed heart, a debt called in. A subplot that arrives at the final chapters carrying nothing is decoration, and the earlier you know that, the cheaper it is to fix.
Subplot, double plot and digression
A double plot grants two storylines near-equal weight and lets them mirror one another; a subplot is honestly subordinate. A digression, the travel sketch or comic set piece beloved of nineteenth-century novelists, contributes texture and voice but no causal traffic, and modern editors tolerate less of it. The romance B story of film convention is simply a subplot with a fixed job: it humanises the protagonist while the A story tests them. Name the weight honestly in your own draft, because each form makes a different promise about how much attention it will repay.
What poets can take from this
- Give every subplot a beginning, a turn and an ending; a strand that only dangles is a leak.
- Cross the wires: make the subplot's complication arrive at the main plot's worst moment.
- Cap novel subplots at what you can resolve; unresolved strands read as broken promises.
- In short fiction, let the subplot live inside existing scenes rather than claiming its own.
- Run the deletion test in revision: cut the subplot mentally and see what actually breaks.
Try it yourself
Write a story whose main plot is a job interview and whose subplot is a parking meter running out three streets away. The meter must change how the interview ends.
Questions
Can a short story have a subplot?
Yes, but compressed: a second pressure threaded through existing scenes rather than a storyline with scenes of its own. If it does not change the ending, the story is better off without it.
How many subplots can a novel hold?
As many as you can resolve with conviction, which for most novels means two or three. Each subplot is a promise of payoff, and readers keep better accounts than writers expect.
Does a subplot need its own arc?
It needs shape: an origin, a complication and a payoff. What it does not need is equal billing; the moment it competes with the main plot for weight, you are drifting toward a double plot.
By the Writory editorial team, reviewed by working poets. Updated July 2026.
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