In 1995, Earth is under the rule of the alien Akron army from the Saar cluster. Its cities have been destroyed, and the survivors are forced to live in squalid shanty towns and villages. Kento, a war orphan, hides with his companions in a cave to escape bandits. Inside, they discover the secret base of Dr. Earl, an inhabitant of Helios, a planet conquered by the Akron. Earl fled to Earth with Helian technology’s greatest achievement, the super robot Daltanius, whose power is amplified when combined with the intelligent lion robot Beralios. Dr. Earl entrusts the defense of Earth to Kenta, who happens to be a descendant from...