Once a Potter-Now a Granger

Harry Potter was four years old when he was adopted by the Granger family. At the same time his sister Victoria Potter was being raised by Lily and James. Why did this family abandon Harry? Why are Harry and Hermione attending Hogwarts? Why is Victoria such a brat? What in the devil's name is going on? Who knows, but it will be fun to find out. Kinda. (Currently being Re-vamped)