The Crown of the Sea

Captain Zora and Rafal Jones ran away from the kingdom of Masbia at nine years old to get away from their abusive parents. But thirteen years later, Zora and her crew face new obstacles as she realizes that she has to go back to the life she ran away from. Back to the life of Princess Lynette where her sister set her up for her mother to hurt her more than she already did.
Her second in command, Rafal Jones, supports whatever her choice may be as long as he doesn't have to face his father.
Zora and Raf manage to figure out how to get into the castle to find the layout of it during a ball and begin planning how Zora would challenge for the throne.