A Spark of Light — Zoe Cannon

Disillusioned by a thousand years of trying to bring light to a darkening world, an angel bound his wings, walked to the tallest bridge in the city, and prepared to jump. Until a passing human intervened. Now she's determined to convince him life is worth living. But her motives may not be as pure as they seem.This short story is 4900 words long. It is also available in Dark Wings, Bright Flame, an urban fantasy short story collection.