A lone stallion, trudging through the wastes of the great Ponave Wasteland, comes across a young pegasus mare. He helps her against his better judgement, not knowing how his life has been changed forever.

Set 50 years after the end of Kkat's Fallout: Equestria. I'm taking many liberties here, mainly that the Pegasus Enclave has been defeated and they have been, warily, accepted into the normal post-apocalyptic pony society.
I shall be drawing on my experience playing both Fo3 and Fo:NV. Expect New Haygas/New Neighgas (Dunno which one I'll use yet) to appear.

The concept was based, in the loosest sense of the word, on Iron Savior's Faster Than All