The Apocalypse. What do you think when you hear those two words? Do you believe it? Do you think it will happen? Well, don't worry, you aren't the only one who thinks those two words are rubbish. Renee Young, and her two sisters, Effy and Allie, thought an Apocalypse was impossible. That was until it happened. Now, they're stuck alone, constantly looking for food and shelter. But what happens when they come upon other life?