As a child Daisuke was abducted; his four friends saved him with the help of a strange woman, Milo, who tells him he will one day save his friends from a great disaster. Now in second year of high school he is obsessed with his alleged heroic destiny, alienating his friends. One day, his hometown of Shibuya, Tokyo is shifted to a post-apocalyptic future and his school is attacked by a mechanical monster, slaughtering some, capturing others. Milo appears and temporarily incapacitates the monster. Apparently, she does not know Daisuke yet, but grasps the situation and leads him to a mecha [Milo calls a String Puppet) to fight the monster (a Revision).