An object or goal that drives the plot but whose specifics barely matter - the briefcase everyone chases.
A MacGuffin is the thing the characters are all after - the briefcase, the microfilm, the formula - that sets the plot in motion while mattering far less in itself than in what the chase reveals. Hitchcock popularized the term, noting the audience rarely cares what's actually inside.
Its interchangeability is the tell: swap the stolen plans for stolen diamonds and the story barely changes, because the MacGuffin's real function is to give incompatible people a reason to collide. It works best when nobody pauses to over-explain it.
Plan with 30+ story frameworks, write your screenplay or novel, and let Quill coach every beat - it guides and never writes. Free account, no card.
