Goldar faces a critical situation: he must kill Kono while at the same time saving an infant that is trapped in a building the monster is trying to destroy. Tom Mura can do nothing but try and hold back the frantic mother of the child, but Mikko calls for Gam as Goldar is fighting Kono. The boys fly into the building and save the child. Goldar takes off into the air, creating a heavy wind as Kono disappears.
Goldar is followed to a volcano by Rodak, but the Space Avenger confronts the villain. Rodak turns into Kono— a mighty creature with super intelligence!! The volcano erupts and Rodak is injured, but escapes once again.
Tom and Mikko return home only to find Rodak and his henchmen holding Tomoko captive. They take Mikko and his whistle to Rodak’s ship and head for space to set a trap for Goldar. Mikko breaks away and blows the whistle, summoning Goldar and Gam. Gam rescues Mikko as Rodak shoots a ray into Goldar, who loses control and drifts into endless space.
Silvar and Gam get permission from Mathusam to go after Goldar. Mathusam contacts Goldar and instructs him to go to the planet where Goldar was created. On this world, Goldar will be able to gather new energy. Goldar locates the planet, but Kono is there! Dodging his way around Kono’s destructive “absolute zero” beam, Goldar absorbs energy from his home planet and finally kills Kono/Rodak!
Back on Earth, Goldar, Silvar and Gam say farewell to their friends and head back into outer space. The threat of Rodak is gone, and the Earth is safe from the space villain for all time!
