Coral Academy and the Emerald Pearl

Sabrina and Kianna Caro are twins and best friends. When Sabrina get excepted into the best school in Oceania and Kianna is not they have to split up. But even though she is not with her sis, Sabrina still has a possibility for a good year at Coral Acadmey.

There is A Rumor going a round that the Emerald pearl is hidden in the school if in the wrong hands it could destroy. The sea horse mail carriers send a letter to Sabrina saying they are after it. But the letter doesn't say who it's from. All Sabrina knows is someone is after the Emerald pearl.