Its the 21st century, and the number of ESPers continues to increase. They are active in the military, diplomacy, politics, and in other places. They hold the key for global competition. A country that controls ESP can control the world! However individuals who posses higher than Level 4 are less than 3% of the population. There are only three Level 7 people who have government contracts. These three are Kaoru, Aoi, and Shiho, ten-year old girls, who work for B.A.B.E.L. With the guidance of Kouichi, a twenty-year old genius, they catch criminals and evil ESPers.