In the future, Earth is an enormous barren wasteland where humans wander aimlessly, plagued by amnesia. Humans live underground and there's a bizarre dust on the surface that few dare to interact with. There's a group of humans who can actually control the dust known as Espers, and these individuals can control it and bend it to their will to learn brand new skills. The card game/action adventure game is a cult hit, and certainly one that left us scratching our heads.