Anima is the "Etherian" girl but UNAWARE of it. Once per millennium, only one single Etherian will be born. If the tree Yggdrasill soaks up ether energy of an Etherian, the lifespan of the earth will be lengthened. Because the earth lacks of ether energy, the organization "Euchrome" wants to sacrifice Anima. Their project is the top secret, for disclosing the truth that the earth is going to be gone causes the worldwide panic. Thus, Anima doesn't know the project.