In Celestia's final moments, she expects a replay of her memories or visions of an afterlife. What she doesn't expect is for a so-called 'God' to criticize her life as a princess leading to her death. And for a deal to be made with this God.

Stranded in an alternate universe where alicorns and other mythical creatures of great power never existed, she finds herself a common unicorn abandoned at an orphanage. War has taken over the land, and this filly, stuck in a war with a thousand-year-old mind, has a simple goal; prove to Being X she doesn't need faith to thrive in this warmongering world. Even if it means joining the war itself.