The Stranger introduced many Americans to existentialism. It made them question what really matters, in that nothing actually does. In this way, it can free you to stop feeling confined by traditional paths, and start living the way you actually want to.
Alison is lucky and she knows it. She has the life she always craved, including a happy home with Jeff and their brilliant, vivacious teenage daughter, Katherine - the absolute centre of Alison's world. Then a knock at the door ends life as they know it.