As the newest member of the Baby-sitters Club, Abby Stevenson is going a million miles an hour. She has so many things to get used to--SMS, her friends in the BSC, and all those wild baby-sitting charges. Plus, Abby's worried her twin sister and mom aren't excited about living in Stoneybrook.

Abby thinks she has everything under control. But then she has an asthma attack while baby-sitting and must be rushed to the hospital. And now Kristy is starting to have her doubts about Abby.

Abby knows she's good enough for the Baby-sitters Club. Now all she has to do is prove it!