Anna Casey likes living in North Florida with biology teacher Miss Johnette, her latest foster mother. Best of all, Miss J wants to adopt Anna. Still, it is hard grow into a new family, a new life, and a new school all at once, especially when you?ve been rootless nearly all of your life. Mica Delano likes living aboard her sailboat, the Martina, which is docked at a marina in the Florida Keys. Best of all, the marina's owners, whom she calls Aunt Emma and Uncle Bert, try hard to make up for the sometimes inattentive parenting she gets from her marine biologist father. But Mica fears that her restless father will soon pull anchor, taking them away from the safety of Bert's Marina. A chance correspondence between these two girls separated by the length of the state of Florida becomes a flourishing friendship. As they share their love of nature, each helps the other cope with uncertainty and loneliness and profound change. When her father gets a grant that will last a year, Mica enrolls in public school for the first time since first grade and suffers the agony of trying to fit in. When her beloved foster mother becomes serious about a suitor, Anna must make room in her heart for a possible rival. In the end, Anna and Mica save each other and themselves with hope, humor, and a shared love of the natural world.