The future earth falls in mental chaos even if it escapes from the common suffering such as hunger and disease owing to the progress of science and technology. The legendary eight monsters were sealed in the eight positions in the world by Sam Jang monk in Tang Dynasty in China. They untie the seal and begin to destroy the earth. The men in earth make 'Mighty Four Devas' with the help of mysterious R on the basis of the legend. They find four boys Keon, Lui, Jean, and Spike to control it. However, they are injured during the exercise due to false operation of computer system by unknown power. The boys do not realize that it is a trick of the eight monsters. On the other hand, Spike, who is falsely accused of the accident, takes action against the monsters by himself. While the misunderstanding and conflict becomes deeper, the boys can not keep tune with each other even if they are on the 'Mighty Four Devas'. Finally, they are attacked by the monsters, and the monsters seize the computer network in the whole world to destroy the base of 'Mighty Four Devas' using intercontinental ballistic missile and strategic nuclear missile......