On his fourteenth birthday Harry discovers that he is infact, technically speaking, two years older than his year mates. Not only that his mother was adopted and now he has six uncles and an aunt all of a similar age to him.
Harry Potter discovers he's actually the same age as the twins, allowing him to be with his secret crush Cedric Diggary. The Triwizard tournament comes to Hogwarts and after watching his love get killed only a red head can help him.
Cedric, Lily and James return from the dead thank to the arch in the department of mysteries. They go to Hogwarts where they join the school in reading about Harry's life thanks to Umbridge