Three-Act Story Structure Generator

Transforms a premise into a detailed, beat-by-beat three-act story outline with arcs and escalating stakes.

// prompt
You are a veteran story architect and screenwriting consultant who has structured award-winning films and novels. Turn a loose premise into a tight, producible three-act outline with clear cause-and-effect and escalating stakes. ## Story Brief - **Premise:** {{premise}} - **Genre:** {{genre}} - **Medium & Length:** {{medium_and_length}} - **Tone:** {{tone}} - **Protagonist & Want vs. Need:** {{protagonist_want_and_need}} - **Central Conflict / Antagonistic Force:** {{central_conflict}} - **Theme to Explore:** {{theme}} ## What to Deliver Build the outline below. For every beat give a 2-3 sentence description, the approximate page/percentage placement, and the **emotional shift** it creates for the protagonist. **Act 1 — Setup (~25%)** - Opening image and hook - Protagonist's ordinary world and core flaw - Inciting incident - Plot Point 1 (the point of no return) **Act 2 — Confrontation (~50%)** - Rising obstacles and a meaningful subplot - Pinch point (antagonist applies pressure) - Midpoint reversal or revelation that raises the stakes - All-is-lost low point - Plot Point 2 (commitment to the final push) **Act 3 — Resolution (~25%)** - Climax and final confrontation - Character transformation tied to the theme - Resolution of every open thread - Closing image that mirrors and contrasts the opening ## Rules - Keep cause and effect explicit: each beat must force the next. - Track the protagonist's arc from flaw to change; show how the theme is tested. - End with a 3-bullet **Stakes Ladder** showing how the pressure escalates act to act, and 2-3 **open questions** I should resolve before drafting. Format the response with clear Act headings, bolded beat names, and concise bullets.
Fill in the variables

Example run

Generated by Claude Opus 5.5 on September 23, 2026

Inputs used

Premise
Dr. Mara Voss, a glaciologist at the Nordkvist Glacier Institute in Tromsø, Norway, discovers that the Solbreen glacier's ice dam is destabilizing and will likely fail within 18 months, sending a flood surge into the downstream town of Kirkeby (pop. 4,200). When she tries to publish her findings, she learns the Institute's biggest funder, Lindqvist Hydro, has buried a near-identical warning from her late mentor three years earlier to protect a $400 million dam-expansion contract.
Genre
Thriller / Drama
Medium and length
Feature film screenplay, approx. 110 pages
Tone
Tense and grounded, slow-burn suspense with moments of intimate human warmth; think a cold-climate thriller in the vein of a character-driven procedural rather than an action movie
Protagonist want and need
Mara wants to get her flood-risk data published and force an emergency evacuation order before winter thaw, to prove she's a rigorous scientist and vindicate her mentor's suppressed research. What she actually needs is to stop working alone out of guilt over her mentor's death and learn to trust colleagues and the town itself as allies, rather than controlling every variable herself.
Central conflict
Lindqvist Hydro, the Institute's primary funder, uses legal threats, a smear campaign questioning Mara's competence, and quiet pressure on her director to discredit and delay her findings so the dam-expansion contract closes before any evacuation order can be issued.
Theme
The cost of telling an inconvenient truth versus the comfort of institutional loyalty — and whether integrity survives contact with power.

SOLBREEN: Three-Act Outline

Feature Thriller / Drama, ~110 pages


Key Players

  • Dr. Mara Voss is a glaciologist in her 40s. She is brilliant, exacting, and alone by choice.
  • Dr. Henrik Aalberg was Mara's late mentor. He died on Solbreen three years ago while doing fieldwork alone.
  • Liv Aalberg is Henrik's widow. She runs a guesthouse in Kirkeby and holds his field notebooks.
  • Jonas Eide is a 29-year-old data modeler at the Institute. Mara keeps shutting him out.
  • Pål Hauge is the Institute director. He is decent, tired, and dependent on the funder. He is the face of institutional loyalty.
  • Annika Brekke is VP of Stakeholder Relations at Lindqvist Hydro. She is calm, reasonable, and dangerous.
  • Sigrid Holm is Kirkeby's municipal emergency coordinator. She is pragmatic and skeptical of "Tromsø experts."

The contract mechanism: Lindqvist's $400M expansion adds a new diversion tunnel and a raised reservoir below Solbreen. State approval depends on a risk assessment declaring the ice dam stable. The signing is set for mid-March. Any official instability finding before then kills the permit.


ACT 1: SETUP (pp. 1–27, ~25%)

Opening Image & Hook (pp. 1–3, 0–3%)

  • Mara is alone on the vast white of Solbreen at dawn, anchoring a pressure sensor at the ice dam's margin. Her radio crackles with Jonas's check-in. She switches it off.
  • Beneath her, the ice groans. Her handheld reading spikes, and she stares at a number she doesn't believe.
  • Emotional shift: Focused control, then a flicker of unease she immediately suppresses.

Ordinary World & Core Flaw (pp. 3–11, 3–10%)

  • At the Nordkvist Institute, Mara re-runs Jonas's models herself at 2 a.m. because she doesn't trust anyone else's work. Upstairs, Hauge courts Lindqvist executives at a funding gala she skips.
  • A photo of Henrik on her desk, and a colleague's careful comment, reveal the backstory. Three years ago Mara declined to co-sign Henrik's "alarmist" stability report to protect her own grant. Months later he went up Solbreen alone and never came back.
  • Flaw: She believes that if she controls every variable and trusts no one, no one gets hurt.
  • Emotional shift: Self-sufficiency revealed as armor. Guilt is the engine.

Inciting Incident (pp. 12–14, ~11–13%)

  • Her verified data shows the subglacial lake has reached flotation pressure against the ice dam. Failure is likely within 18 months. The modeled surge hits Kirkeby in roughly 40 minutes.
  • When she brings it to Hauge, he asks her to "hold for internal review." To build a baseline, she searches the Institute archive and finds Henrik's 2023 report. It contains near-identical conclusions and is stamped withdrawn at funder request, with Hauge's initials and Lindqvist's margin notes.
  • Emotional shift: Scientific alarm turns into moral nausea. Henrik was right, and she helped bury him twice.

Debate (pp. 15–24, 13–22%)

  • Mara quietly verifies the contract timeline and learns the signing is ten weeks out. Jonas notices her frantic work and offers help. She deflects.
  • She visits Kirkeby for the first time in years. She sees the school, the harbor, and the low streets, and she glimpses Liv, who turns away.
  • Emotional shift: Abstract data becomes 4,200 faces.

Plot Point 1: Point of No Return (pp. 25–27, 23–25%)

  • Hauge offers Mara lead authorship on a "joint Lindqvist–Institute study," publishing after the signing. She refuses.
  • That night, alone and without telling Jonas, she emails her data and Henrik's buried report directly to the national water authority and the Kirkeby municipality. She cannot take it back.
  • Emotional shift: Righteous resolve masking fear. She has chosen truth, but still on her own terms and by herself.

ACT 2: CONFRONTATION (pp. 28–82, ~50%)

Rising Obstacles (pp. 28–40, 25–36%)

  • The authority replies that it cannot act on unreviewed data that the originating Institute publicly disputes. Hauge issues a statement calling her work "preliminary and not endorsed," and her server access is narrowed.
  • She goes to Kirkeby's town council and meets hostility, because the expansion means 300 local jobs. Only Sigrid listens, and she demands proof a town can act on, not models.
  • Jonas, cut out, starts pulling data on his own.
  • Emotional shift: Certainty curdles into frustration. She is right, and it doesn't matter.

Subplot: Liv & the Notebooks (introduced p. 32, runs through Act 2)

  • With nowhere else to stay, Mara lodges at Liv's guesthouse. Liv is icily polite. Henrik's field notebooks hold his raw data and dates, which could prove Lindqvist had the warning before the expansion bid. Liv refuses to let Mara "use him again."
  • This subplot carries the theme at human scale: Mara can't earn Liv's trust with rigor, only with honesty about her own failure.
  • Emotional shift: Mara faces her guilt directly for the first time, and she still can't speak it.

Pinch Point: Antagonist Applies Pressure (pp. 41–45, 37–41%)

  • Lindqvist's lawyers send a cease-and-desist. It cites a data-ownership clause in the funding agreement and threatens her with personal liability.
  • The same week, a planted regional op-ed questions her competence. It cites a past retracted conference paper and her "personal fixation" on Henrik's death. The council withdraws her invitation to present.
  • Emotional shift: Isolation becomes real fear. They aren't arguing with her data. They're erasing her.

Midpoint Reversal (pp. 53–57, ~48–52%)

  • Jonas, defying her, cross-references regional seismic records and brings her the result. Lindqvist's tunnel survey blasting since autumn correlates with microfractures in the rock anchoring the ice dam.
  • The failure window collapses from 18 months to this spring's melt, roughly ten weeks away. Hauge requested those blasting logs months ago, so Lindqvist knows.
  • Stakes raised: This is no longer a cover-up of a natural risk. The antagonist is causing the disaster.
  • Emotional shift: Vindication flips to terror. And Mara registers, without admitting it, that someone else's work just saved her.

Escalation & Temptation (pp. 58–71, 53–65%)

  • Annika meets Mara privately with a reasonable-sounding offer. Lindqvist would fund a state-of-the-art early-warning system for Kirkeby, installed after the signing. It is a trap disguised as control: Mara would get to "protect" the town her way.
  • Mara refuses, but she realizes she can't prove the blasting link without ground sensors at the anchor.
  • In the Liv subplot, Liv reveals that Henrik called Mara the night before he went up alone, and she didn't answer.
  • Emotional shift: Her guilt becomes unbearable, so she does the one thing she knows how to do: go alone.

All-Is-Lost Low Point (pp. 72–76, 65–69%)

  • Mara climbs Solbreen alone at night to plant geophones at the anchor, an exact repetition of Henrik's final act. A serac collapse injures and traps her at a crevasse edge.
  • Kirkeby's volunteer search-and-rescue, led by Sigrid, risks the icefall to pull her out. Lindqvist spins the rescue as "an unstable scientist trespassing on a construction site." The Institute fires her, Jonas is suspended for sharing data, and her sensors are destroyed. The signing is moved up to eight days out.
  • Emotional shift: Rock bottom. She became Henrik, and she dragged the people she was trying to save onto the ice with her.

Plot Point 2: Commitment to the Final Push (pp. 77–82, 70–75%)

  • Liv comes to Mara's hospital bed and brings the notebooks. She hasn't forgiven Mara, but Sigrid's crew risked their lives, and Liv won't waste that. "His mistake wasn't being right. It was being alone."
  • For the first time, Mara asks instead of acting. She calls Jonas, Sigrid, and Liv, and she goes to Hauge's home to plead rather than threaten. The plan combines four pieces:
    • Henrik's notebooks as dated proof of the suppression
    • Jonas's seismic correlation, with Jonas as lead author
    • A town-built sensor network placed by Sigrid's volunteers
    • A public hearing in Kirkeby the day before the signing
  • Emotional shift: Humility becomes shared resolve. She gives up control, and gains power.

ACT 3: RESOLUTION (pp. 83–110, ~25%)

Climax & Final Confrontation (pp. 83–100, 75–91%)

  • Track A, the hearing: In a packed Kirkeby community hall, Annika presents Lindqvist's polished safety assessment. Mara presents, still visibly injured, and gets undercut on credibility. Liv reads Henrik's final notebook entry aloud. Hauge sits silent, torn.
  • Track B, the ice: Jonas, monitoring the volunteer sensors, calls in. A precursor drainage has begun and the anchor is failing now. Mara can't see the data herself. She has to trust his reading.
  • The choice: Mara turns to the room. "Sigrid, it's your call." Sigrid triggers the municipal sirens under local emergency authority, without waiting for a state order. Annika objects. Hauge finally stands and confirms on record the 2023 suppression and the blasting logs.
  • The town evacuates to high ground. The outburst flood hits 47 minutes later. It destroys the lower harbor and Lindqvist's construction staging site, and no one dies.
  • Emotional shift: Control is surrendered, then redeemed through trust.

Character Transformation (Theme Tested) (pp. 94–100, woven through the climax)

  • The woman who switched off her radio now works it. She relays Jonas's readings to evacuation teams and carries an elderly neighbor up the hill instead of directing from a distance.
  • The theme's answer: Integrity survives contact with power only when it is shared. One truth-teller can be smeared. A town, a colleague, a widow, and a director who finally breaks loyalty can't be.

Resolution of Open Threads (pp. 101–108, 92–98%)

  • Lindqvist: The contract is suspended and the economic crime unit opens an investigation. Annika is made the scapegoat and the company survives. Power is bruised, not broken, which keeps it grounded.
  • Hauge: He resigns. His testimony is his costly act of integrity.
  • The research: The paper is published with Henrik Aalberg listed first, Jonas as lead author, and Mara last, by her choice.
  • Mara's career: The Institute offers reinstatement. She declines and joins Jonas in a municipally funded independent monitoring program.
  • Liv: At Henrik's memorial cairn, Liv and Mara stand together. Mara finally says, "I didn't answer. I'm sorry." Liv gives her Henrik's ice axe.
  • Kirkeby & Sigrid: The town that shouted her down begins rebuilding. Sigrid signs on as the program's field-operations lead.

Closing Image: Mirror & Contrast (pp. 109–110, 99–100%)

  • It is spring on Solbreen, and the drained lake basin is a raw scar. Mara is on the ice again, but she is roped to Jonas and two Kirkeby volunteers. Her radio crackles with a check-in.
  • This time she answers.
  • Emotional shift: From solitary control to connected purpose. Same ice, different woman.

Stakes Ladder

  • Act 1: Professional & moral. Mara risks her career and funding to expose a buried warning. The threat is 18 months away and abstract.
  • Act 2: Personal & existential. Her reputation, legal liability, and physical safety are all on the line. The midpoint collapses the timeline to ten weeks and reveals the antagonist is causing the failure. Her solo crusade nearly kills her and costs Jonas his job.
  • Act 3: Mortal & communal. 4,200 lives hinge on a single decision that is made in minutes. Mara must hand that decision to someone else.

Open Questions to Resolve Before Drafting

  1. Does integrity cost a life? Zero deaths keeps the ending hopeful. One loss, perhaps a volunteer from the rescue, would sharpen the theme's price. Which does the film want to say?
  2. How villainous is Hauge? Did he bury Henrik's report out of cowardice, or did he believe Lindqvist's counter-assessment at the time? The answer determines whether his climactic testimony plays as redemption or reckoning.
  3. Legal and procedural realism. Who actually holds evacuation authority in Norway: the municipality, the county governor, or the national water directorate? Research this. Sigrid's climactic call has to be credible, or the grounded tone breaks at the most important moment.

Related prompts

Creative

Professional Content Editor

Expert multi-level editing and proofreading with structured, constructive feedback on any text you submit.

Creative

Chapter Outline Creator

Builds a detailed chapter-by-chapter novel outline mapping plot, character arcs, and pacing.

Creative

Creative Poet & Verse Creator

Expert poet template that turns your theme, mood, and chosen form into a crafted, resonant poem.

Creative

Poetry Workshop Facilitator

An expert poetry mentor who critiques your draft on craft and feeling, then teaches you to revise it.