What is Mcguffin?
1.
An object or person in a movie that has no use other than to drive the narrative forward. originally coined by alfred hitchcock.
the suitcase in pulp fiction
2.
A phrase used in detective stories to describe the one vital clue that causes the whole plot to fall in to place.
Eg.
"I couldn't figure it out...until I saw the tube of toothpaste."
