"From the fields of yonder, three new biped deliverers will come to deliver Equestria from the forces of Peron," or so Pinkie Pie prophesies.

Equestria is now under attack from a gang of South American socialists that call themselves the Social Peronistas' Association of Reliable Kindred who Love Equines, or simply "the Peronistas" for short. This group of humans have managed to hijack their way into Equestria without any form of pony help via their own high-tech means, and have taken Princesses Celestia, Luna, and Twilight Sparkle into captivity (and rendering their horns harmless). The other ponies have been forced to either flee to the mountain caves (the unicorns and earth ponies) or to the air-pressure-high city of Cloudsdale (the pegasi, with the exception of Derpy, who follows the unicorns and earth ponies to the caverns). In the absence of the ponies, the Peronistas have brought in numerous other bipedal races – from minions to Smurfs – to settle in the conquered cities of Appleloosa, Ponyville, and Canterlot; and to work the land on their so-called "collectivised farms", especially at Appleloosa.

Derpy decides that the three most appropriate saviours of Equestria are three humans – James Bond, the well-known British detective; Eric Cartman, one of the best young karate fighters from South Park in the USA; and the Bolivian Amerindian Alberto Garcia, the only brony among the three, and also the reigning Bolivian TF2 Champion.

Can the three humans unite with their pony friends to fight against the Peronistas and bring them back to Earth for a fair trial?