A MacGuffin is a goal object that motivates the characters while being, in itself, unimportant — the briefcase, the formula, the microfilm. Popularised by Alfred Hitchcock, who was explicit that the audience should not care what it is, the device works because pursuit generates plot regardless of what is pursued. The term is now widely misapplied to any important object, which drains it of the distinction that made it useful: a MacGuffin is defined by its interchangeability, and an object whose specific properties matter is simply a plot element.
Also written as mcguffin, maguffin.
The interchangeability test
Ask whether the story would need rewriting if the object were replaced with a different one of similar value. If the plot survives the swap intact, it is a MacGuffin. If the object's particular nature drives scenes — it must be kept cold, it can only be used once, it changes whoever holds it — it is not a MacGuffin, whatever the marketing copy says. The One Ring is the standard counterexample: its properties determine the plot and corrupt its bearers, so it fails the test entirely.
What it is good for
The device earns its place when the writer's interest is in the pursuers rather than the pursuit. Because nothing about the object needs establishing, the pages that would have gone into its rules go into the people chasing it and what they do to each other on the way. Heist and chase narratives use it for exactly this reason, and the best of them make the MacGuffin's emptiness explicit at the end.
Its failure mode
A MacGuffin fails when the story asks the reader to care about it after all. If the climax turns on what the object is, or the ending's emotional weight rests on obtaining it, the reader is being asked to invest retrospectively in something the book took care not to make interesting. Either commit to emptiness and let the meaning live in the characters, or give the object real properties from the start.
The deliberate reveal
A common sophisticated move is to make the MacGuffin's meaninglessness the point: the characters destroy each other over something that turns out to be worthless, trivial, or already gone. This converts the device into a theme rather than a mechanism, and it only works if the emptiness was honestly maintained throughout rather than invented in the last chapter.
Where to see it working
The Maltese Falcon — Dashiell Hammett
The statuette's worthlessness is the ending, which is the device used as theme rather than mechanism.
The 39 Steps — John Buchan
The source of Hitchcock's own MacGuffin discussions, where the secret pursued matters far less than the pursuit.
The Lord of the Rings — J. R. R. Tolkien
The standard counterexample — the Ring's specific properties generate the plot, so it is not a MacGuffin.
How it goes wrong
Calling any important object a MacGuffin, which loses the interchangeability distinction that defines it.
Asking the reader to care about the object in the climax after taking care to keep it uninteresting.
Giving it rules and properties, at which point it is a plot element and should be treated as one.
Revealing its emptiness as a late twist when the book has been treating it as meaningful throughout.
Related terms
Chekhov's Gun
The principle that a conspicuously introduced detail must later be used, and anything never used should be removed.
Red Herring
A clue that genuinely points somewhere, misleads the reader honestly, and remains explicable once the real solution lands.
Three-Act Structure
The default Western plot shape: setup, confrontation, resolution, hinged on two turning points at roughly 25% and 75%.
Grimdark
Fantasy characterised by moral ambiguity, institutional cruelty and consequence, where virtue is not structurally rewarded.
Not sure which shelf your own manuscript belongs on? Run it through the book genre and comp title finder — free, no sign-up.