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.
佐原健二
as Shigeru Kawamura
白川由美
as Kiyo
平田昭彦
as Professor Kyuichiro Kashiwagi
山田巳之助
as Mining Chief Osaki
田島 義文
as Izeki
小堀阿吉雄
as Police Chief Nishimura
津田光男
as Staff Officer Takeuchi
今泉廉
as Sunagawa
向井淳一郎
as Military officer
緒方燐作
as Goro
千葉一郎
as Chief of Police
Tsurue Ichimanji
as Haru
