Nopony knows much about Rainbow's family or early life, but that's all about to change when her older brother, Lightning Streak, comes to Ponyville. However, his past is cloudier than hers, and not even Rainbow knows the whole story. Where has he been for the past twelve years? What's he been doing? Why does he keep receiving mysterious letters? Where are their parents in all of this? And just how the hell does a pegasus end up with a unicorn for a brother? These questions, and many more, will be answered in due time... All in due time....(rated mature for in-depth descriptions of murder later on, you have been warned)

Edit: My first original cover art, yay! Done by FlutterPal