Sarah Smith

Kate’s life in Baton Rouge, full of friends and family, gymnastics and Girl Scouts, is just plain great. But then, at the age of twelve, she suddenly develops a mysterious shoulder pain that won’t go away . . . and that will change her life forever. It turns out that Kate has one of the rarest genetic disorders in the world, Fibrodysplasia Ossificans Progressiva. FOP causes bone to form in places in the body where it shouldn’t, and there’s no cure yet.

Ana Dakkar is a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world. Ana's parents died while on a scientific expedition two years ago, and the only family's she's got left is her older brother, Dev, also a student at HP. Ana's freshman year culminates with the class' weekend trial at sea, the details of which have been kept secret. She only hopes she has what it'll take to succeed.