Usage patterns
〈物〉を語るto tell/narrate a story
He told the story of his own life.
物語が始まるfor a story to begin
This story begins long ago in a certain village.
物語の主人公the protagonist of a story
The protagonist of the story was a brave boy.
〈物〉に基づいた物語a story based on something
This movie is a story based on a true event.