Most Hollywood screenplays tell the story of someone who has an ordinary, stable life, and then—and then!—something happens. A bus blows up. A single woman meets a cute stranger. A bus blows up, and then, on another bus that is also rigged with a bomb, a single woman meets a cute stranger. You get the idea.
The story is about what transpires after the something upends the calm and steady predictability of ordinary life. That something demonstrates how the hero or heroes deal with adversity. It's a test of character that shows you who they really are.
