Three nights have passed since the terrible device known as Von Folgers' Eye was unleashed on Paris, and now its unstoppable course has taken it across Europe and America. The Experts of Justice launch the mighty airship Greta Garbo, but the forces of Big Fire are not content to stand by and watch their masterpiece defeated.

Big Fire's mighty Orb has disappeared, its anti-Shizuma field inactive and Taiso's sacrifice has brought the Experts of Justice some valuable time. Giant Robo, meanwhile, is lost amongst the frozen Himalayan mountains.

Genya returns to Big Fire's secret headquarters with a new plan to put a cessation to the hostilities once and for all. As the surviving Experts of Justice regroup and nurse their injuries, they learn that neither Giant Robo or Agent Gineri are now trusted by Interpol. The Expert's resources are now truly stretched to breaking point, especially after the final attack on Saint Abbe.

Emmanuelle acquires the third sample, prompting both Chief Chujo and agent Ginrei to prepare for the ultimate sacrifice.