"In the year 3001, a robot rebellion erupts on the peaceful planet Psycon. The people are slaughtered by the robots, and the last survivor, an Esper, escapes to Earth. Finally, the cosmic outlaws invade Earth. In an instant, Earth's headquarters is reduced to rubble. Helplessly, Earth awaits a critical moment, preparing for a counterattack. The messengers of justice, one, two, and three! Join forces to stop the Master's conquest of Earth!" - Translated Korean DVD Synopsis