Every story hinges on the premise, which is the idea that drives the story from beginning to end. The premise is a short blurb, often found on the back cover. The author may or may not write it out, but it is always there, at the very least in the author’s mind before and during the writing process.
How do you write a premise?
According to Joe Bunting at The Write Practice, a premise must contain three elements:
1. The protagonist
2. The setting
3. What the protagonist wants and why he can’t get it.