How to Write a Logline for a Screenplay
Build a film logline that names protagonist, goal, obstacle, and stakes—without turning the pitch into a synopsis.
A screenplay logline is a one-sentence proof that the movie has a person, a visible want, and a reason the next two hours exist. Write the engine, not the synopsis: who is forced to act, what they must do in the world, and what breaks if they fail.
Why film loglines are stricter than book copy
A novel can live in thought for a chapter. A script cannot. If the want cannot be photographed—an object taken, a door reached, a vote lost, a body hidden—the sentence will sound like a theme and the script will stall in talk.
The Visible Want Test is the named check: Could a stranger film the goal without voiceover? “Find herself” fails. “Deliver the tape before sunrise” passes. “Become brave” fails. “Walk into the reunion and name the lie” passes.
If you already write fiction, keep how to write a logline for a novel in the other tab so you do not import novel-interior habits by accident. And do not confuse the logline with a title or a tagline; title vs logline vs tagline are three different jobs even when the project is a film.
A working template (steal the slots, not the rhythm)
When INCITING SITUATION, a ROLE + FLAW OR DUTY must VISIBLE GOAL, or PRICE—while ANTAGONISTIC PRESSURE makes the obvious path unusable.
You will rewrite it twenty times. That is the point. Each rewrite is a diagnosis: missing clock, missing person, missing filmable action, missing cost.
Avoid:
- Character names nobody knows yet (role first; names later if they carry irony)
- Theme posters (“a story about family”)
- Cast lists (“and his ragtag team”)
- Endings
- World bibles
Example — horror
Weak: “A woman confronts trauma in a haunted house.”
Stronger: “After her sister vanishes during a wellness retreat, a skeptical paramedic must last until dawn in the clinic’s sealed wing—or become the next ‘success story’ the staff needs to hide.”
Why it works: role (paramedic), visible goal (last until dawn / find the sister), closed geography, institutional antagonist, price (erasure dressed as wellness). You can storyboard it.
If the horror is supernatural, name the rule of the night in a fragment, not a lore dump: “each hour the staff reset a guest’s memories.” If you cannot name a rule, you may have atmosphere without a movie.
Example — coming-of-age
Weak: “A teen learns to be herself in a new town.”
Stronger: “When a scholarship kid is bussed into a coastal academy for one semester, she must win the year-end boat trial her mother already posted online—or go home as the failure the town paid to watch.”
Why it works: the trial is filmable; the posted expectation is social pressure; the semester is a clock. Interior change (who she is when nobody is filming) can occupy the middle without being the logline.
Coming-of-age scripts die when the logline is only a mood. Mood is direction. Logline is the bet.
Structure underneath, not inside the sentence
You do not cram three-act vs seven-point into the logline. You use those maps to check it:
- If the logline has no midpoint-shaped reversal available, the want is too small.
- If the logline has no antagonist that can occupy act two, you have a situation, not a film.
- If the price is “feel sad,” seven-point structure will show you an empty dark night.
Write the sentence. Then ask where the midpoint could flip the method, not the genre.
Common failures (and the fix)
The encyclopedia. You explained the world’s history. Fix: start at the day the status quo breaks.
The ensemble blur. Five names, no engine. Fix: whose decision the camera must follow when plans collide.
The vibe. Beautiful adjectives, no verb. Fix: replace adjectives with a task.
The twist tell. You spoiled the third-act identity. Fix: pressure the lie without naming the truth.
The novel leak. “She realizes her father never loved her.” Fix: what she does because of that—drops the lawsuit, burns the letter, takes the stand.
Process: five drafts in one hour
- Ugly fill-in-the-blanks (10 min)
- Cut every clause that is not person, want, obstacle, price (10)
- Read aloud; mark the stumble (5)
- Write three variants that change only the antagonist (15)
- Pick the one a stranger could repeat (20, including a walk)
If you are still hunting situations rather than sharpening one, an AI plot generator can throw premise sparks—brainstorming only. Do not ask it to “write my logline” and paste the result. The sentence has to survive a producer who has heard a thousand of them; that survival is your taste.
After the logline
The next honest job is not more sentences. It is whether the script’s first ten pages dramatize the same want. If page one is a different movie, the logline is a wish. Align them, then outline.
A good logline is slightly unfair to the protagonist. If it sounds comfortable, it is copy. If it sounds like a problem you would pay to watch someone try to solve, keep it.
What “brainstorming only” means
A generator that lists ten hauntings can unstick a blank page. A generator that outputs a polished logline will sound like every other polished logline in the pile. Take the hauntings. Write the sentence. If the plot generator starts rewriting your antagonist into a committee, close it.
Horror vs coming-of-age in the same slots
Both examples use role, clock, visible task, and social or institutional pressure. Horror’s clock is the night; coming-of-age’s clock is the semester. Horror’s price is erasure; coming-of-age’s price is a public failure already advertised. Swap the clocks and you get different movies. That swap is a better brainstorm than adding adjectives.
When you need a pile of bad premises to reject, PlotnAI can supply volume; the keep/kill decision stays yours.