Young Harley Potter doesn't know that she's a Potter. She doesn't even know that she's a witch. And the weirdest thing Harley ever heard? She has a twin- the famous Harry Potter. Since she was 13, she had to catch up with the Magic lessons and Professor Dumbledore is by her side to teach her for the whole summer. But since the news have been spread all across the Magical World, Voldemort finds a way to destroy the Potter Twins, once and for all.