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That might be a good way to write a mystery, but it's not a good way to write a story.
The characters drive the story. You need compelling characters. Then you need to decide the arc that they will go through.
Some excellent pieces have been written on the structure of story, such as Joseph Campbell's Hero Of A Thousand Faces, or even Dan Harmons much condensed story circle : A character is introduced, wants something, enters a new environment, adapts to that environment, achieves their goal but encounters problems as a result, leaves that world and changes as a result.