For a moment, imagine everything you thought you knew about your life, your parents and siblings, your entire identity, turned out to be some sort of twisted fiction. Add a bit of cloak and dagger to the mix, and you'll have an idea of where this story takes you.
You're not really who you thought you were - you're actually someone else in the same familiar body you've always known. You need to begin a new life story, putting the puzzle pieces in place as you go along.
One fellow put it to me very succinctly: "It's like you have one of those huge, 1,000-piece jigsaw puzzles in front of you...except you don't have the picture on the front of the box to look at."