The Beginning events.

Harry Potter, an ordinary boy with nothing special. One day he's living peacefully the next he is fighting the most powerful wizard of all time. How it it all start? Why is he the chosen one?. It all started one day when Voldemort was being a complete, trolling evil wizard and tries to kill Lily and James Potter, he went for James first then then Harry, Lily being a loving mother protects Harry and makes the ultimate sacrifice of love to save harry and protect him from Voldemort's attacks. The only thing Harry gets left with is a scar a tiny scar on his head that would soon have the impact of an earthquake on his life. No one knows how Dumbledore and Hagrid retrieves harry and gives him to the Dudley family. It was Snape, Severus Snape, a mysterious man who later on we learn has a very big crush on Lily Potter that he dedicates his life to protecting her and keeping Harry safe, but tries not to show his care until the very last book and movie. Well that's a bit on his early life and what was actually going on not just bits and skips of the movie (which is completely annoying as we all want to know how and why things happen).