An inventor and his family try to raise funds to feed a giant monster named Daigoro so that he doesn't shrink. Meanwhile, a meteor lands into the sea bringing with it another giant monster named Goliath. Will Daigoro be able to stop Goliath?

The film consists of re-edited material from the original television series Ultraman. Episodes 1, 8, 26, and 27 were used for the film. They were narrated by Hikari Urano as an "Ultraman Documentary". Allegedly only one new scene was shot, and that some parts of the movie where shot in black and white for unknown reasons. The movie screened at the same time as the Toho movie King Kong Escapes.

Akio Jissoji's Ultraman is a 1979 Japanese tokusatsu kaiju film directed by Akio Jissoji. It is a compilation film made up of scenes from Jissoji's episodes of the original Ultraman TV series.