Hook (filmmaking)
The hook is the nucleus of both a film and its screenplay. It is what grabs the viewer's attention, preferably in the first 5–10 minutes, as a reader might expect to find a literary hook in the first chapter of a novel.
During the pitch process, a screenwriter will use a hook to prove the "bankable" quality of their screenplay.Knowing the importance of a good hook, many screenwriters write their hooks first. Conceivably, the life of a screenplay might evolve from hook to 1-page synopsis, to 4-page treatment, to full treatment, to scriptment, to screenplay.