Yarthgo the hero must stop an evil Krieas Princess from destroying Astral East with a weather machine. He infiltrates Wedno to liberate Zale and Zandar. Hector Bensun the 'Vapor Man' locates Zale's sister Inez and throws Quade out a window during their fight. Hector and Inez find twin baby girls and adopt them. Quade steals the Starbird while Yarthgo is inside the dungeon. Hector Bensun is aboard the stolen spaceship and soon captured by the Krieas. Yarthgo and Zale carry Zandar to a Wasp hangar. They hijack a Shuttlecraft then escape. Terron's Air Brigade try to shoot them down. Yarthgo uses his flying expertise to keep them airborne. Anne attacks Ondid Island with her weather weapon. Tigre is mortally wounded while fighting to save his aquanauts. Quade discovers Bensun on the Starbird and takes him prisoner. The princess orders Krieas to dismantle the 'Vapor Man' so she can salvage his parts. Yarthgo flies a collision course to prevent Anne from shooting down the shuttle. As he homes in on her, she fires the weather device. Anne's machine is struck by lightning, which vaporizes her in the process. Bensun defeats Quade, steals the weather weapon and escapes. Tigre dies at the Barcel lab. Rath is elected ruler of Ondid. His aquanauts capture Krieas and Terrons after a heated battle at the devastated island. Inez has to be vaporized due to ill health then becomes an android to stay with Bensun whom she has fallen in love with. Tomac installs remote satellite dishes on distant comets to aid his 'Miraculous Time Bender for space travel.