The document is a reading comprehension worksheet about a story called "Mariah Keeps Cool" that discusses the following key details: 1) Mariah wants her friend Eleana to solve a secret code created by Digby Perkins for the sake of all the girls at their middle school. 2) Eleana says Digby Perkins's code wasn't willing to give up its key, and a clue leads her to the computer keyboard. 3) Mariah plans a birthday party for her half-sister Lynn despite Lynn saying she doesn't want one, hoping to get along with Lynn better.