Following the victory of the Gutsy Galaxy Guard against the Zonder Empire and the 31 Primevals, a new threat emerges on Earth. GGG teams up with their French counterpart Chasseur to fight the nefarious organization BioNet, with Guy Shishio and the newly created GaoFighGar. Renais Cardiff Shishioh, a former BioNet cyborg with a persistent desire of killing those who took away her humanity, is among Chasseur's ranks. However, while GGG and Chasseur combat the BioNet, GGG's bases throughout the world are unexpectedly assaulted, and Mamoru Amami, who has been captured and cloned by an even larger menace known as the "Eleven Kings of Sol," steals the freshly found "Q-Parts" and the original Gao Machines.