Maia D’Apliese and her five sisters gather together at their childhood home, “Atlantis” --- a secluded castle situated on the shores of Lake Geneva --- having been told that their beloved father, who adopted them all as babies, has died. Each of them is handed a tantalizing clue to her true heritage --- a clue which takes Maia across the world to Rio de Janeiro, Brazil. Once there, she begins to put together the pieces of her story and its beginnings.
Escaping a recent heartbreak in New York, Grania Ryan returns to her family home on the wind-swept coast of Ireland. During a walk on the edge of a cliff, she meets a young girl named Aurora Lisle who is about to profoundly change her.