The story of the Heffalump is in Winnie-The-Pooh. You know that book.
One day Piglet and Winnie-the-Pooh want to catch a Heffalump.
Winnie falls in the Very Deep pit. His head in the honey-jar.
Piglet peeps into the trap, and the Heffalump is there!
Christopher Robin comes to save the bear.
The shape of the story
I prefer another metaphor to picture the shape of the story.
The story starts with a blue sky.
Winnie falls in the pit, the sky is dark and cloudy.
Christopher comes and the sky is blue again.
Vonnegut would say this is a man in hole story.
In the story the characters have opinions. (Rule #13: Give your characters opinions. Passive/malleable might seem likable to you as you write, but it’s poison to the audience.) That is the fun part of the story. Winnie has opinions on honey and on self-confidence (“I was right. It is honey right the way down.”) and Piglet has opinions on bravery. (for the word which was really jiggeting about in his brain was “Heffalumps” )
The story spine
It is a once upon a time story.
Talking about Heffalumps. W & P dicide to catch a Heffalump.
Than, because of that they dig a pit and put a jar of honey in it
W falls in the pit. The head of W is in the jar.
Piglet is afraid of the Heffalump in the pit.
Here the spine has a new element, a savior.
Christopher comes and saves both.