Ten years ago, junior high school student Ouyang Ming accidentally discovered a "white tune" that led to a different world in the mountains behind his hometown. This alien world is similar to Earth, but there are no traces of humans, only powerful alien beasts roaming rampant. In an ancient ruins, he found simplified characters and mysterious symbols that recorded the secrets of beast-taming runes, and brought back three runes. With his genius-like scientific mind, Ouyang Ming transformed rune stones into "energy cards" and established a contract system with alien beasts, allowing humans to summon alien beasts to fight together.
