The heroes of the series Mazinger Z and Devilman fighting against the evil Demon Clan.

Kouji and his friends have defeated Dr. Hell and are now enjoying a break, but suddenly a strange prophet appears and warns everyone of an oncoming danger, mechanical beasts never seen before start appearing all around the world wrecking havoc. Its up to Kouji and his Mazinger Z to stand up to this threat but it seems he is vastly outnumber and outmatched.

This film served as an alternative link between the Mazinger Z TV series and the Great Mazinger TV series. It basically introduces Great Mazinger to the audience, as well as his enemies from the Mikene Empire.

Goro briefly returns to Japan after a triumphant campaign in the US. He is heading towards Fukuoka where he played baseball when he was a fifth grader. Having just moved into a new town, this is where Goro faced a critical point in his life. (Source: ANN)

While investigating a sound anomaly across the galaxy, Basara crash-lands on a snowy planet and receives an unfriendly welcome from the local residents. On the planet, he befriends Pedro, a four-year-old boy who watches the Galaxy Network and idolizes Fire Bomber. Basara also discovers that the sound he's searching for is generated by Emilia, a lone Meltrandi struggling to make music of her own. (Source: ANN)