Mining engineer Shigeru investigates the disappearance and death of his fellow coworkers when prehistoric nymphs are discovered emerging from the mines. After an attack on the local village, Shigeru heads deeper into the mines only to make a more horrifying discovery in the form a prehistoric flying creature. Soon a second monster appears as the two converge in Fukuoka.
Kenji Sahara
Shigeru Kawamura
Yumi Shirakawa
Kiyo
Akihiko Hirata
Professor Kyuichiro Kashiwagi
Minosuke Yamada
Mining Chief Osaki
Yoshibumi Tajima
Izeki
Akio Kobori
Police Chief Nishimura
Mitsuo Tsuda
Staff Officer Takeuchi
Ren Imaizumi
Sunagawa
