Cassandra has learned not only how to read other people’s thoughts, but also how to travel through time along the line of her own life, changing her mindset—and as a result, changing the future. But the butterfly effect is still in play: by rewriting her fate, the girl influences the future of humanity. It’s hard to resist the temptation to create the perfect world with such power in your hands. But what is the cost of that—and how many times will she have to break the world to reach perfection?