Dr. Saotome recruits the first Getter pilot a young martial artist by the name of Ryoma Nagare.
Dr. Saotome and Ryoma atempt to recruit the second Getter pilot Hayato Jin the leader of a criminal gang.
The Oni attack monastery leaving oly one survivor a monk named Benkei Musashibou. Dr. Saotome belives Benkei to be the third Getter pilot.
Ryoma, Hayato and Benkei clash over Ryoma's attatude and reckless behaviour.
Ryoma tired of waiting to be attacked decides to follow an escaping Oni to find where they are coming from, meanwhile an archaeological dig turns up the skulls of dead Oni.
The Getter and it's three pilots are seperated and sent to an altered past where the humans and Oni are at war.
Still in the past Hayato and Benkei are reunited with the Getter. Ryoma attacks the Oni mansion.
The Getter and the human army storm the Oni City, Ryoma goes after Seimei.
After returning home the Getter is upgraded and Ryoma gets a glimpse of a terrible future.
After his vision of the future Ryoma leaves as Seimei returns to once again battle the Getter.
Benkei attempts to destroy the Getter leading to a fight with Ryoma. Hayato learns more about the getter rays.
"Gods" arrive on earth to battle the Getter, the prototype Getters begin to act alone without pilots.
The three pilots begin to fuse to the Getter as they battle with the "Gods".