A powerful alien race threatens to destroy the earth. To save the world, governments have come together to create Persephone, an artificial being, half alien and half human. She just follows orders. She doesn't like being chosen to save the world, but she also doesn't want to say no to her superiors. Since she was created in a laboratory, she does not know what the warmth of a family is. She does not understand human emotions well, and it is difficult for him to express himself. She has powers.