Thriller

Thrillers

Many films have a MacGuffin; a MacGuffin is a plot element that catches the viewers attention or drives the plot of a work of fiction.
The defining aspect of a MacGuffin is that the major players in the story are (at least) willing to do and sacrifice almost anything to obtain it, regardless of what the MacGuffin actually is. Sometimes the MacGuffin is ambiguous, villains want money, power, victory etc.
The MacGuffin is usually shown at the beginning, sometimes the end or its forgotten.

Hitchcock defined a MacGuffin as the object around which the plot revolves but as to what that object specifically is, he declared, "the audience don't care".