When Tom (a girl) and Aaron get sent on a mission to Retrieve an item Tom's great Aunt Thomasina Had tried to find but failed when the ship which the item was on sank. Aaron and Tom have to embark on a Long journey to the bottom of the sea just to try to find this item. But the people who Tom and Aaron thought were their friends turned out to be against then and the people they thought were against them turned out to be their friends. Will Tom and Aaron succeed or will the Item be lost forever?