In this story:

-James Potter and Lily Potter are alive.

-Peter Pettigrew is in azkaban, captured by James Potter and Sirius Black during the first Wizarding war.

-Voldemort doesn't return. He died that night when he tried to kill Harry.

-The stuff which included Voldemort didn't happen in first to third year and won't happen.

-The Malfoys don't hate muggles and muggleborns.

-That's about it. Enjoy!