As part of his nefarious efforts to extract the secrets of the HO evaporation bomb, the evil Skull Mask and his expendable masked-henchmen kidnap the inventor (Junya Usami) and his daughter (Hiroko Mine), only to be repeatedly thwarted by the heroic 'Moon Light Mask' (?). I found this relic on-line while researching early Japanese sci-fi TV. It appears to be the second of the 'Moon Light Mask' movies to come out in 1958 and is the conclusion of the story begun in the first film ('Moon Light Mask', a recap is helpfully provided). As the films were adaptations of the seminal Japanese TV-superhero series, this 58 minute adventure is sufficient to get a sense of the popular kid's small-screen tokusatsu. The series' premise is very similar 'western' masked hero series (The Lone Ranger, Batman, etc) as the mysterious masked hero appears out of nowhere and saves the day (meanwhile handsome young detective Juro Iwai (Fumitake Omura) is inexplicably absent). Little effort is made to explain where the hero keeps his costume, which always seems nearby when needed and, if Juro Iwai is indeed Moon Light Mask, his various colleagues are as oblivious as Lois Lane and Jimmy Olson are to a Kryptonian übermensh in their midst. The 'modern' super-powered (or at least super-competent) masked hero has a long history in Japan, starting with the kamishibai (paper theater) hero Ogon Bat (Golden Bat) in 1931, but Moon Light Mask was the first of these characters to appear on TV ('Super Giant' flew into theatre screens a year earlier). Although the old series can be enjoyable in a retro-charming way, they likely won't be much in the way of entertainment to anyone not either interested in, or nostalgic for, the earliest years of Japanese fantasy TV. I have had little luck in finding examples of the old shows, so quite pleased when a search popped up this fun B/W relic.