While covering a test of guided torpedoes, two reporters believe they saw what appeared to be a strange-looking swimming creature. They investigate the matter further and discover that there is a race of fish-men living under the sea. The fish-men capture the pair and keep them prisoner in their underwater city.
Starring: Shin'ichi Chiba
Directed By: Hajime Satô
Written By: Masami Fukushima,Kôichi Ôtsu