Nim loves her island home and the animals she shares it with even while her scientist father is away doing research, but trouble is on the way and a new e-mail friend could be the only one who can help.

When Madison is bored and lonely at summer camp, she discovers a mission in saving the local turtles.

On Anna Maria Island, Florida, with her mother and younger sister, Lanie, for the summer vacation, twelve-year old Olivia is upset by her parents' divorce, especially as she has always been closest to her father who is not with them this year; she plans to lie low and nurse her hurt and anger--until she learns that the local population of sea turtles is threatened by her neighbor's beach house, and realizes that she has to do something about it.