John Ward works as a librarian and lives in a small cubicle due to overpopulation. He befriends Henry Rossiter and they discover a secret room, gaining power and privacy but losing it as others move in. The story is a critique of overpopulation, showing a dystopian future where people live in tiny spaces with no beauty or possessions. The cubicle symbolizes the lack of freedom and dignity people experience due to insufficient living space from overcrowding.