I’m going to write a story about a girl and her best friend. He always seems to be in trouble, and somehow she always seems to manage to get him out of it. It transpires that he is the incarnation of Trouble, and she is the incarnation of Luck. They have adventures.
I haven’t gotten very far, if by, “haven’t gotten very far” you mean, “what, I have to come up with a plot, instead of just the story of how they start out on the plot? And then I have to WRITE IT DOWN? crazy talk.”