An account of an individual's life / (by extension) A long detailed monologue to someone

plural of story beat

An interaction, between characters in a drama, that advances the plot

(authorship) A subplot that appears in a screenplay or script for a movie or television show; a subplot that concerns the side-characters or less important aspects of a television show.

Alternative form of backstory

(journalism) A human-interest story or article that is not closely tied to a recent news event.

Alternative form of storyline

plural of story line

A literary technique whereby an introductory or main narrative is presented, at least in part, for the purpose of setting the stage either for a more emphasized second narrative or for a set of shorter stories.

The situation is too complicated or extensive to talk about. / The situation is too embarrassing to talk about.