Harry and Alice Potter and the Sorcerer's stone

Also known as The Earlier Drafts Story. In an earlier draft of SS, the Potters lived on an island in the ocean, while the Grangers lived nearby. When the house is destroyed, Mr. Granger rows out and retrieves Harry and (this is where MY plot twist comes in) Harry's twin sister, Alice. The two children are taken to the Dursleys, and that's where our story begins…