Every story begins with an idea (an event, a scene, a character, a setting, a theme, etc.), and most ideas begin with a question and a sense of curiosity. Most of those questions start with ”What if…”.
”What if…” questions can vary in a million different ways. They can ask questions about the plot, scenes, characters, and everything else that constructs a story. There are no limits.
Perhaps not all stories begin with these ”what if…” questions articulated, however, most stories are ultimately inspired by questions like these.