Plot

Always dig deeper. You’ve got it all outlined, where it’s going. But stop and mine deeper. As Melville says, “dig out the fundamental meaning of events by organizing …around some primary theme suggested by the character’s concern.” (The Art of Fiction pg 176)
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Theme is a melody that’s playing as your story unfolds. When the reader puts the book down, the melody stays in his or her head.
For example the theme of Romeo and Juliet might be that love is stronger than death. Or the melody of the Godfather might be that family is above all. (the book Godfather, anyway.)