In the future, people with ESP are becoming more widespread, requiring training to be able to use their power for constructive purposes. Unfortunately, there are also espers that abuse their powers and wield them to destructive ends. The Japanese government's solution to both challenges is the establishment of the Base of Backing ESP Laboratory (B.A.B.E.L.) for the purpose of appraising, identifying, nurturing, and protecting espers (even if that means apprehending them as if they were criminals). Five decades later, B.A.B.E.L. locates a trio of natural Level 7 (the maximum esper potency designation) espers within Japan, and assembles them into the special esper team known as "The Children". However, all three have developed questionable attitudes because of the persecution and ostracizati