How to Write a Novel Synopsis Agents Actually Read

You finished the book. Ninety-four thousand words, three drafts, a beta reader who cried at the right chapter. You wrote the query letter last weekend and it's honestly not bad. Then you open the submission form for the agent at the top of your list and there's a second box under the query: Synopsis (1–2 pages).

And something in your chest drops, because you know what that box is asking for. Not a pitch. Not a teaser. The whole story, ending included, squeezed into roughly the space of one long scene, written in a register you've spent years training yourself out of.

The good news: the synopsis is the most learnable document in querying. Its rules are fairly consistent, and once you see what it's for, it stops feeling like a betrayal of your book.

What Is a Novel Synopsis?

A novel synopsis is a one-to-two-page summary of your book's entire plot, including the ending, written in third person and present tense. Agents use it to check whether the story holds together from first chapter to last before they spend hours reading the manuscript.

A query letter asks do I want to read this? A synopsis answers does it work? Agent Kaitlyn Johnson, writing in Writer's Digest, put it bluntly: "a synopsis is NOT your query and vice versa," and the synopsis "sums up exactly what happens in your manuscript." She also notes that "if you jump the shark anywhere in your book, an agent or editor wants to know."

So the synopsis isn't a trailer. It's a plot autopsy. It lays the skeleton on the table so a professional can see whether the bones connect.

How Long Should a Synopsis Be?

Aim for about 500 words for a one-page synopsis, and no more than 1,000 for a two-page one, unless an agent's guidelines say otherwise. When in doubt, go shorter.

Jane Friedman recommends "a one- or two-page synopsis—about 500-1000 words, single spaced." Jericho Writers suggests around 500 words and flags that a lot of solid synopses run to two formatted pages. Johnson notes that "most agents/editors prefer no longer than two pages."

The practical move is to write two versions once and stop thinking about it: a 500-word version and a 900-word version. Paste the short one when a form says one page, the long one for anything bigger.

The Rules Most Agents Agree On

Write in third person and present tense, reveal the ending, name only the characters who change the outcome, and put each main character's name in caps the first time it appears. Those four conventions cover most of what separates a professional synopsis from an amateur one.

• Third person, present tense, even if your novel is first-person past. Friedman is explicit: "third person, present tense (even if your novel is written in first person)."
• The ending, all of it. This is the part writers fight hardest. Johnson: "And yes, that does mean revealing the ending." Jericho lists hiding the twist as a common mistake. You will find the occasional guide that says to hint instead, but the agent-side advice is consistent: a synopsis without an ending isn't a synopsis.
• Four or five named characters, max. Jericho recommends keeping the named cast to four or five. Everyone else becomes "her brother," "the harbormaster," "a rival cartographer."
• CAPS on first mention of each main character's name, followed by a quick descriptor and, often, an age.
• Telling is fine. This is the one document where "she's a hopeless romantic" is acceptable shorthand. Friedman calls for "lean, clean, powerful language," not lyricism.

What doesn't belong: rhetorical questions ("Will she find the truth before it's too late?"), commentary on themes ("this is a story about grief"), descriptions of the book's construction ("in the novel's climax"), and blow-by-blow choreography. Friedman's fight-scene rule is the best one-line edit you'll ever get: say who wins and who loses.

The "So" Test: The Spine of Every Synopsis

A good synopsis reads as a chain of cause and effect, where every event happens because of the one before it. If you can't connect two sentences with "so" or "but," one of them probably doesn't belong.

Agents aren't reading a synopsis for events; they're reading it for causality. A list that goes "this happens, then this happens, then this happens" tells them the plot might be episodic. A chain that goes "this happens, so she does this, but that backfires, so now she has to—" tells them the book has an engine.

Friedman describes it as incident plus reaction, leading to a decision. In practice: every paragraph should contain something that happens, how the protagonist feels about it, and what she chooses to do next. Drop the choice and your protagonist reads as passive, and an agent will assume the manuscript has the same problem.

Call it the "so" test: every sentence has to earn a so.

How to Write a Synopsis, Step by Step

Start from chapter summaries, compress to the turning points, rebuild as a cause-and-effect chain, then cut to length. Writing from memory produces synopses weighted toward whatever you revised most recently, not what matters most.

1. Summarize every chapter in one or two sentences

Open each chapter and write what changes in it. Not "Wren goes to the archive" but "Wren finds her mother's name crossed out of the guild register and realizes she was expelled, not retired."

If you outlined beforehand, you've got a head start; a beat sheet maps almost directly onto synopsis paragraphs. In NovelMage, the chapter and scene summaries are auto-generated as you write, so this step becomes reading forty short paragraphs instead of rereading a book.

2. Mark the load-bearing beats

Go through your list and star the chapters where the protagonist's situation or goal changes: the status quo, the inciting incident, the escalations, the crisis, the resolution. Jericho suggests sketching the plot first under roughly those five headings, then layering in character and emotional stakes.

3. Check every subplot against the ending

Friedman's test is brutal and correct: if the ending wouldn't make sense without a character or plot point, include it. If it would, cut it, no matter how much you love it.

4. Write it straight through, ugly

One draft, start to finish, no polishing, "so" and "but" connectors and all.

5. Cut to 900, then cut to 500

The 900-word version keeps one sentence of emotional reaction per turning point. The 500-word version keeps the reaction only where it causes the next decision.

Worked Example: 94,000 Words Down to One Page

Take a plausible book: The Undrowned Map, a 94,000-word fantasy, 41 chapters. The protagonist, Margit Holloway, is a 26-year-old cartographer's apprentice in a city that floods every spring.

Step one produces 41 chapter summaries at about 35 words each. That's roughly 1,400 words, still a list. Margit stars nine chapters as load-bearing. Her best friend Odile has a subplot about a failing bookbindery that runs through eleven chapters; it's lovely, and it doesn't touch the ending. Odile becomes "her friend" and gets half a sentence.

The first full draft comes out at 1,180 words. Here's a paragraph from it:

MARGIT HOLLOWAY (26), apprentice to the city's last flood-mapper, discovers that the official maps have been redrawn every year to hide a sunken district. She is shaken. She goes to see her master, who is ill. He tells her to drop it. She thinks about it for several days.

Every sentence is true. None are connected. Run the "so" test:

MARGIT HOLLOWAY (26), apprentice to the city's last flood-mapper, discovers the official maps have been redrawn for thirty years to hide a sunken district — the district where her mother drowned. When her dying master orders her to drop it, she realizes he drew the forgeries himself, and she steals his original plates.

Same length, but now there's a discovery, a personal stake, a betrayal, and a choice, each pushing into the next.

After two more passes Margit has a 910-word version and a 520-word version, and the 520-word version still ends with exactly what happens on the last page: she publishes the true map, the city council falls, and she chooses to stay in the flood district rather than take the guild's offer to leave. The ending is the audition. It's the one paragraph that proves the setup paid off.

Using AI to Draft a Synopsis (Without the Usual Mistakes)

AI is genuinely good at compressing chapter summaries into a first-pass synopsis, and genuinely bad at knowing which threads matter. Use it for step four, the ugly draft, not for step two or three.

Ask a model for a synopsis cold and you'll usually get a blurb: rhetorical questions, "a tale of love and loss," a coy last line hiding the twist — the exact list of things agents tell you not to do. A few fixes:

• Feed it your summaries, not the manuscript. You've already done the judgment work in steps two and three. Give the model the starred beats and ask it only to connect them.
• Paste the rules into the prompt. "Third person, present tense, reveal the ending, no rhetorical questions, no themes, main character names in caps on first mention, maximum five named characters, 500 words."
• Ask for causality explicitly. "Each paragraph must contain an event, the protagonist's reaction, and the decision that leads to the next paragraph."
• Check the ending against your actual last chapter. Models compressing long material sometimes smooth an ambiguous or bittersweet ending into a tidy one. If your story's details are scattered, a story bible makes this check a five-minute job.

Then rewrite it in your own words. Johnson notes that "voice will always matter," and an agent reading a synopsis that sounds generically machine-smooth will reasonably wonder what the manuscript sounds like. If you're unsure where AI help crosses into something you'd need to mention, the rules are covered in whether you have to disclose AI use to literary agents.

One practical worry: pasting a full unpublished manuscript into a cloud chatbot to get a synopsis means your book sits on someone else's servers. If that bothers you, run the compression step on a local model. NovelMage connects to Ollama or LM Studio so the whole manuscript stays on your machine, and the one-time $99.99 license means a synopsis rewrite at 1am doesn't cost you another month of a subscription.

Frequently Asked Questions

Should a synopsis include the ending?
Yes. Agents use the synopsis specifically to judge whether the ending pays off what the beginning set up, so hiding it defeats the document's purpose. A small number of guides recommend hinting at a twist instead, but if an agent's guidelines don't say otherwise, reveal everything, including the twist.

What's the difference between a synopsis and a query letter?
A query letter is a roughly one-page pitch designed to make an agent want to read the book; it stops before the ending. A synopsis is a plain summary of the entire plot designed to show the agent the story works. Many agents ask for both, and they should never be the same text.

Do I write the synopsis in first person if my novel is first person?
No. Write it in third person, present tense, regardless of the novel's POV. The synopsis describes the story from outside; a first-person narrator's voice can come through in a single quoted line if it's pivotal, but the summary itself stays in third.

What if different agents ask for different lengths?
Keep two versions ready, about 500 and 900 words. The short one covers "one page" requests, and the long one covers anything from "two pages" up. Always follow a specific agent's stated guidelines over general advice, including this.

The Synopsis Is a Revision Tool, Too

If you can't connect chapter fourteen to chapter fifteen with a "so," that's not a summarizing problem. It's a sag in the middle of the book, and it's far cheaper to find it now than in a form rejection. Write the synopsis at the end of draft two, not the week you query. The plot autopsy is kinder to you than an agent will be.

If you want the chapter summaries already sitting there when you sit down to write it, and your manuscript never leaving your laptop while a model helps you compress them, try NovelMage free for seven days, no credit card required.