In the year 200X, Doctor Rando, a genius scientist gone mad, has broken the peace on the Earth by trying to conquer the world from his Polar base, using an army of his Metal Beasts, super robots developed by him to conquer the world and led by his genetically created officers.

This prompts the improvement of Getter to make it a transforming machine piloted by three persons, capable of defeating the Metal Beasts and stopping Dr. Rando from conquering the world.

Each episode features a different metal beast enemy, a similar format to the anime television series Mazinger Z.

The series also marked the renewal of business relationships between Toei Animation and Go Nagai, which were interrupted by the conflict with Daiku Maryu Gaiking.

The soundtrack is available in two CDs, one of which was re-released years later, The opening and ending themes are available in several compilation albums of the Getter Robo series.

Two of them were drawn by Tatsuo Yasuda, the first one was published in the magazine TV-kun from December 28, 1990 (1990-12-28) to April 30, 1991 (1991-04-30) and the chapters have been collected into a single volume.

Sixteen years after Ryouma Nagare, Hayato Jin and Benkei Kuruma defeated the Hundred Oni Empire (百鬼帝国, Hyakki Teikoku), research has begun to develop a new set of Getter Machines in order to fight the threat of a new, cyborg-like species known as Metal Beasts, led by the evil Professor Rando of the "Vega Zone".