Jessi recently moved to Stoneybrook and is one of the newest members of the Baby-Sitters Club. She has been getting ready to start regularly sitting for the BSC’s newest charge, Matt Braddock. Matt has been deaf since birth and uses sign language to communicate, so Jessi has to use it too. It’s like a secret language they share. Soon all the neighborhood kids want to learn how to sign, which keeps the club members busy. Jessi’s the busiest of all – she’s preparing for the dance school’s big show, plus working on another secret just for Matt. Will Jessi be able to keep the secret and pull off her performance too? This newest in the ever popular graphic novel series about the best babysitters ever.