Harry Potter was the boy who lost too much and now he lost his mortality to save a life. So he fled the world he loved. Following the direction pointed by Dumbledore, he began the journey to find Carlisle Cullen, only to be distracted by a real-life Aphrodite he met on his way.
After the Second Wizarding War ended horribly, the Savior of Britain traveled to the past in order to reverse the death of his loved ones, stumbling across a seemingly mentally-ill girl who claimed to be able to see the future.