Twelve-year-old Natalia Rose Baleine Gallagher has to move, again.

The paparazzi are stalking Nat and her movie-star father. And it's all her ex­-best friend Solly's fault . . . sort of. But Nat doesn't want to think about that. Nat prefers to think of the possibilities ahead of her: the possibility that she'll see whales on the beach near her new home, that Harry--who she just met--will be her new best friend, that she and her dad won't have to move again again.

Most of all, Nat dreams of the possibility that her faraway mother misses and loves her--and is waiting for Nat to find her. Then, just as Nat is settling in to her new home, unexpected events, including a chance encounter with a whale, send her on a journey of self-discovery that will change her life--and quite possibly her father's, Harry's, and Solly's too--forever.