Sosai X's voice resounds: "Did you see that, Gel Sadra? This is the space plant Redda which I manufactured". Through Governor X's mysterious extraterrestrial science, the artificial space plant Redda is born. By coincidence, a boy named Harry finds one seed which has been blown away, and takes it back home. Sprouting, Redda grows very quickly and attacks Jinpei, who has come to visit Harry. But suddenly, Redda withers when it is eaten at by huge swallow-tails caterpillars. Soon, the seed is spread out by Galactor in the city of Newshington. The city is converted into a jungle. But since Reddy is neither hurt by fire nor by blades, Jinpei proposes using its natural enemy, the swallow-tail caterpillars. The caterpillars are collected immediately and spread out in the city. Through this measure, Redda suffers a total defeat due to this measure. The Science Ninja Team also destroys the Galactor base which was still under construction. However, after eating Redda, the swallow-tails grow very quickly and soon end their short lifespan.