Well, what did happen on Fox Street? Lots of things, it turns out. 10-year- old Mo Wren is out of school for the year, but she is not exactly having a relaxing summer. She has to deal with a best friend who visits for the summer, but who may have changed more than Mo realized. She must constantly babysit her 5-year old sister Dottie, the "wild child," while their dad is working long hours at a job he doesn't like. She still misses her mom, who died a few years before. In the meantime, one older neighbor is keeping Mo busy with strange errands, and another may be having too many medical problems to stay in her house.