A powerful storm is raging in the dead of night, and a transport vehicle carrying uranium is forced to stop due to a landslide blocking off the road on the mountain pass they were traveling on. As the driver tried to contact the transport's headquarters, a second landslide from the heavy rain comes crashing down onto the vehicle, sending it over the edge of a cliff and into the sea below. The storm is the result of an intense typhoon striking Japan,leaving hundreds dead and several hundreds more without homes. Reports from the survivors begin to pour in to the City News Division, leaving every reporter on staff manning the phones to take down any new information regarding the storm. One reporter, Goro Ryouji, nicknamed the "Suppon", arrives late, much to the anger of his boss, but he reveals that he's following up on the transport vehicle's crash. He also lets his boss know that the news division's competitors don't know about this yet, so Goro has an exclusive scoop at the time. The next day, the National Atomic Energy Center and the police have begun to investigate the area near where the vehicle went off the edge. Detective Yamato arrives to ask Dr. Ukyo if there have been any readings of radioactivity, to which the doctor nods and wonders if the vehicle was completely washed to sea. Goro soon arrives, revealing his information on both Yamato and Ukyo before revealing that he knows about the special uranium that it was containing, Uran X. As the three talk, they begin to hear strange roaring noises near the mountainside, which one of the police officers refers to as the "Tengu's Great Trumpet Shell", a large cave that funnels air in such a way to produce the sound. Goro rushes into the cave to explore it, only to run back out in a panic exclaiming that something has appeared. A strange light appears from the tunnel, which Goro says was a one-eyed monster, but as the four look on in fear, the light goes out, and a young boy with a flashlight, Monta, comes