The night Lily and James Potter died, they managed to do two things. They protected their 1-year-old son, Harry. But he wasn't the only one. The other was sent far away, so far they believed no one would ever look for her. Just 2 months old at the time, Ariana Marian Potter was sent far beyond Voldemort's clutches - all the way to America. Not that he didn't try. His servants had been instructed to kill the girl before she turned a year old. But an identity change and adoption by a family in Boston made that plan useless - because Ariana was a survivor, no matter what. Now known as Ariana May Clark, she was raised with no knowledge of anything related to Witchcraft or Wizardry. Until her 11th birthday, that was, when yet another flaw meant she was listed to go to a very special school - and that was where her life would change forever. That was where she would meet her friends, and most of all, where she would meet (though neither knew it at the time) her big brother.

Dumbeldore couldn't believe his oversight. The Potters had asked him to arrange for their children to be taken to safety, and he had managed one before Voldemort had killed them. But he had forgotten to take Ariana's name off the list. If the girl had any of her father's genes, she would come. All he could do now was change the letter and the list for the Sorting Hat to the new name she went by. She would attend Hogwarts as a Clark, not a Potter. It was crucial that neither she nor Harry found out that they were related. Crucial that Ariana never found out who she was.