Rafflesia, the largest flower on earth, is found to be a plant man from outer space. This flower, which needs radioactivity to survive, is stronger than it looks, and even Astro is no match for it.

世界最大の花、ラフレシア。それはじつは宇宙からやってきた植物人間だった。放射能を求めるラフレシアは、見た目以上に強く、アトムでさえ太刀打ちできない--。