Crop circles magically appear in Farmer Johnson's field. A mysterious light sweeps over the night sky and awakens Farmer Johnson and Gilbert, the boy next door. Curious, Gilbert ventures out to discover the source of the light and stumbles into a beautiful Martian girl sitting in a crop circle. Farmer Johnson also investigates the strange light, and thinking that Gilbert and Aoléon are vandals, he chases them.
Aoléon and Gilbert have become the Luminon's top priority in stopping the Martian resistance movement. After being chased by the Royal Paladin Guard, they are forced to flee the Martian Megalopolis. Aoléon, Gilbert, and Zoot escape with the help of Bizwat and his newfound friend, Helios, a first-generation soldierbot. After their saucer is destroyed, they crash land somewhere in the deep Martian desert. They set out to locate Kyrios and the secret base where Aoléon's parents are being held captive.
Aoleon and Gilbert are entrusted with a mission from PAX, a wanted criminal and leader of the Martian resistance movement. He wants them to investigate the Luminon of Mars, who he suspects is planning an invasion of Earth to steal its milk cows. Gilbert has an encounter with the Luminess (the mate of the Luminon) and discovers something strange about her. The undercover duo is chased by the Royal Paladin Guard.
Aoléon, Gilbert, Bizwat, Helios, and Zoot make it to their final destination, Cydonia, where Aoléon's parents are being held captive. They infiltrate a secret underground base and are confronted by a small army of sentrybots. Bizwat lends Aoléon and Gilbert some of his advanced combat skills via a psionic brain dump.
Spying on the Luminon, Aoléon and Gilbert uncover his plot to steal Earth's milk cows. They make the disturbing discovery that the Martian leader plans to disrupt Mars' galact supply. Hoping to reach the galactworks before the Luminon's saboteur, the duo races to warn Aoléon's father, Deimos, manager at the galactworks, that he is in danger.
"Very enjoyable story. Captivating narration."