Koichi Kamiya is a Japanese middle school student, but then one day a mysterious voice awakens him from his dreams and asks him to fight against evil in the name of Babel II. The next day, he meets Juju, Wong and the powerful Lord Yomi, the latter of whom is trying to gather a powerful group of people with psychic powers in order to take over the world. But first, he needs Babel's Legacy, a tremendous power which can only be used by Babel's successor, and this successor is, of course, Koichi himself. With the help of Rohdem, the shape-shifting black panther, Robross, the giant bird and Poseidon, the giant robot which lives in the ocean, he will protect Earth from Lord Yomi and his evil forces.