Altered Reality
This is a staple of Sci-Fi and speculative fiction: you’re watching people in Forties garb but discover you’re on a space station populated by aliens who only know humans through one random Bogart movie they’ve intercepted….
But it happens in real life too: a woman thinks she’s in a happy marriage only to come home to empty closets and a note on the kitchen table; you think you’re reading a standard love story only to discover a twist at the end…
Write a story with an element of altered reality.
Go!