Daybreak finds her peaceful life of shining and looking upon Equestria from the night sky ruined when a promise from a very long time ago sends her hurdling to the ground. Now she must learn everything she can from Celestia before Celestia has to ascend back to the heavens where she belongs. The worst part is that Daybreak has no interest in ruling, and would much rather go home then stay on a land of mortality for hundreds of thousands of years. Darker in later chapters, I'm putting a tag just in case.
This story is set in a headcan/au where stars are sentiant (clearly). Based loosely on the book "Stardust"