Here's a breakdown:
* Plot: Refers to the sequence of events that happen in the story. It's the "what" of the story, the actions and conflicts that drive the narrative.
* Theme: Is the underlying message or idea explored in the story. It's the "why" of the story, the deeper meaning or insight the author wants to convey.
* Subject Matter: Is the general topic or area of focus of the story. It's the "what" of the story in a broader sense, without delving into specifics like plot points.
For example:
* Plot: A young woman inherits a mysterious old house and uncovers a hidden treasure.
* Theme: The corrupting influence of wealth or the power of perseverance.
* Subject Matter: Inheritance, mystery, adventure.