While mining a train tunnel between Tokyo & Osaka, a construction crew unearths a strange object from within a huge underground cavern. Unable to identify the object, Jun and Yuriko venture into the tunnel to further investigate. In the meantime, Ippei and a reporter, with the help of a young boy named Liro, discover that the object is the egg of the giant bird called Litra. According to ancient legend, when Litra's egg is found, the giant monster Gomess will appear to destroy the Earth and consequently, Litra will rise up to defend against it.

When Yuriko investigates increased volcanic activity in the Mt. Fuji area, she learns the story of a modern-day Tarzan named Takeru, who is rumored to live in the region's dense woods since becoming lost within them 15 years ago. Meanwhile underground volcanic energy creates boiling temperatures in a lake at the foot of the mountain and a huge boulder erupts from the waters. Because the rock obstructs a main travel route, it is blasted apart with dynamite and the pieces are transported back into the forest. At one night, the pieces collect around a strange luminescent rock, creating an enormous rock monster called Gorgos that lives and breathes like an animal.

Yuriko and Ippei are passangers on the inaugural voyage of the Inazuma; a futuristic bullet train leaving New Tokyo Station for North Kyushu. Mistaking it for Yuriko's case, Ippei accidently brings along the high-pressure container which houses Dr. Aikawa's artifical lifeforrn, M1.

Following the sighting of a UFO and the destruction of two J.S.D.F jets sent to investigate, a series of strange disappearances plagues Tokyo. When Yuriko witnesses a woman vanish before her eyes, she begins her own investigation.

Joe Aikawa, better known as Dynamite Joe, takes Japan by storm as he rises through a series of decisive victories to become the country's new boxing champion. Prior to the match for the world championship title however, Joe mysteriously disappears from the sports world, creating controversy towards his promoter.