Louis Roi is a soldier who has fought and sacrificed for his country. When sentient ponies from the magical island of Equestria announce that humanity's end is nigh, he refuses to accept that having his humanity stripped away is the only survival option.

Griffons hold the answer to Louis' problem. Long marginalised by pony society, the griffons see human ideas and technology as a way to regain their long-lost place in the world. Now all they need is a volunteer to take the leap from human to griffon.