Answer: No it shouldn't
Explanation:
"Unless "city" is part of the name (i.e. "Carson City" or "New York City"), it's not capitalized after the city's name. Even used before (as in "City of"), the capitalization only happens if the title of the city in question actually has that name ("City of London", "City of New York")."
I think it might be “It introduces the story and sets up the coming events.” I’m not sure so take this with a grain of salt...
A central idea of a text is the author's overall idea that is presented throughout the text that is thoroughly supported.
