A single episode in a chain of many, and, quite possibly, many more. Through accident somepony comes into the possession of a strange metallic wings that apparently has an agenda and mind of its own. Powerful artefact that can be used for good but, perhaps, only to the bitter end of its bearer.

Was this the One Wing? One of three? Seven? Nine? And if it is just one of many, then who bear the others? And whose back is adorned by the One?