An idea is not a story. Development is the work of turning one into the other, and skipping it
is why so many promising premises collapse in the middle of a draft.
Step 1: find the engine
Every workable premise contains something that generates events on its own. A goal with a
deadline. A secret that will be discovered. A countdown. A lie that has to be maintained.
If you cannot identify what forces your story to keep moving, that is the first thing to build.
Without an engine you will be pushing every scene uphill by hand.
Step 2: decide whose story it is
Often less obvious than it seems. The person the idea came from is not always the person the
story belongs to. The protagonist should be whoever changes most, whoever has most at stake, and
whoever makes the decisions that drive events.
If those three are different people, you have a structural problem worth resolving before you
write.
Step 3: build the opposition before the plot
Most writers develop the protagonist thoroughly and the antagonist barely, then wonder why the
middle is soft. Opposition determines the shape of the story more than the protagonist does,
because it determines what happens.
The opposition needs a goal that is incompatible with the protagonist's, a reason it cannot be
easily overcome, and ideally a position the audience can understand even while opposing it.
Step 4: find the escalation
Name the complications, each worse than the last, each caused by the previous one. Caused by
matters enormously. A sequence of unrelated bad events is not escalation, it is a list.
Three is enough to know you have a film. If you cannot reach three, the premise needs more
work before it can carry a draft.
Step 5: locate the midpoint
Something must change in the middle, or act two becomes one long stretch of the same thing.
Useful midpoints usually recontextualise: information that changes the meaning of everything
before it, a victory that creates a worse problem, or the moment the protagonist stops running.
Step 6: know the ending, at least roughly
Not the final scene, but the answer to the question your story asks. Do they get what they
want? Do they get what they need instead? Does the cost turn out to be too high?
Writing toward an unknown ending is possible and some writers work that way deliberately. For
a first script it is the most common cause of abandonment.
How long this takes
Longer than most people expect and much less time than a failed draft. Development is where
problems are cheap to fix. A structural flaw costs an afternoon at this stage and three months
once you are on page seventy.
The part that is hard alone
Development is fundamentally a conversation. It works by someone asking what happens then, and
why would he do that, and what if she already knew. The questions do the work.
Writers with access to a room or a trusted collaborator get this automatically. Writers without
it tend to develop in their own head, where every answer sounds fine, which is exactly the
condition under which weak premises survive to page sixty.
Originally published at https://www.moviementors.ai/answers/how-to-develop-a-movie-idea.html.
Written by the team behind Movie Mentors.
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