Prompt -- in the future, paper is expensive and very rarely seen, books have been replaced by data implants. you are visiting an elderly relative who lives in the city and they have just informed you of a secret. in the darkness, behind a secret wall, she
You finally realize that everyone on the train is completely still, some seem to have stopped mid stride walking down the aisle. You receive a text"You will become one of them if you don't get off this train within 5 minutes.