Becca Wong Walker may be so shy that most people at school think she doesn’t speak at all, but why should she care? She has more important things to worry about. Missy, the manatee who visits the dock in Becca’s backyard—and Becca’s only friend—hasn’t been seen for a long time. When Missy finally does return, she has a new baby with her! Becca wants to be excited, but now more than ever, inconsiderate boaters are speeding through the river, putting the lives of Missy and her baby in terrible danger.

But soon Becca has even more to juggle. A school project pairs her with two kids who are her polar opposites: a super-outgoing new neighbor and a boy who’s got a joke for every situation. Then her dad announces plans to host a local speedboat contest that could put her wildlife friends in harm’s way. Can Becca handle all the new challenges happening in her life?