After a giant jellyfish-like alien comes to earth and sucks up all the coal in the Tokyo area, a band of citizens, including a Scientist, a Diamond Broker and a Police Inspector, band together to try and find a way to kill it, after missiles and shells prove ineffective. After several attacks, the main characters find that wasp venom can be used to kill the beast. An artificial substance of equal power is hastily manufactured and after a long while, the mammoth Dogora is finally defeated.
Actor's name on the left, characters played on the right.
- Robert Dunham - Mark Jackson
- Yosuke Natsuki - Komai
- Nobuo Nakamura - Dr. Munakata
- Hisoshi Koizumi - Kirino
- Yoko Fujiyama - Munakata's Assistant
- Akiki Wakabayashi - Hamako, Diamond Thief
- Susumu Fujita - Defense Force Executive Officer
- Seizaburo Kawazu - Chief Diamond Thief
- Yoshifumi Tajima - Tada, Thief
- Eisei Amamoto - Maki, Thief
- Haruya Katou - Sabu, Thief
- Jun Takazi - Police Chief
- Jun Funado - Detective Nitta
- Hideo Shibuya - Journalist