Voldemort kills everyone at Bills wedding which frees Harrys power to kill and soak up his opponents magic. He then is transferred into another dimension where he died as infant and Voldemort rules. All characters there (Susan, Hermione, Fleur, Ron, Bill, Twins, …) have a different life story. The population is dramatically reduced. Harry and His Majesty’s Army join together to extinguish magic.
The story can be read online or as PDF.