In the year 2055, an evil alien by the name of Rajican attacks Earth, the only remaining place of harmony in our Galaxy. As a consequence, the Earth Federation, a united organization for world peace, commissions Dr. Grumm, one of their leading scientists, to develop effective defense systems. Dr. Grumm heads "The Raven", a secret base in which he trains young kids with powerful psychic abilities to become pilots of huge, mind-controlled robots. Hammer, Calito, Hanna and Sandy, four gifted teenagers, are trained as Earth`s last line of defense. But with 5 different Psi-Bots ready for battle, a new pilot must join the team. The newcomer, Jacques, has a hard time fitting in. His enormous, latent Psi-Powers are only surpassed by his ego and so he is constantly fighting with his fellow Ravens and especially Calito, for the position of the Ace pilot and team leader.