One thousand years from now, humanity live pastoral lives aided by psychokinetic powers and the subservient Monster Rats. Saki Watanabe has just come of age, and her power has been reined in through meditation and hypnosis. She joins the Unified Class, where she will learn about her power and the world around her; yet so much of the truth is kept hidden. Her friends Shun, Mamoru, Satoru, and Maria share in her curiosity, and decide to go out of their way to seek the truth. But will the secrets of the past and present turn out to be things that Saki really wants to know?