* The title is slightly incorrect: There might be a slight variation in the title, or it's from a lesser-known or niche publication.
* It's a personal work: The story could be a personal piece, like a short story or essay written by Sarah Ellis for a specific audience, and therefore not widely available.
To help me understand what you're looking for, could you please provide more context?
* Where did you encounter the title "Story Knife"? Was it in a book, magazine, online forum, or somewhere else?
* Do you remember any details about the story? Even a brief summary of the plot or characters might help.
With more information, I can try to help you figure out the message of "Story Knife."