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After going against her Purpose in [[Unearthlyby Cynthia Hand|Unearthly]], part-angel Clara is at something of a loose end. What are you supposed to do when you've gone against your one calling in life?
A new vision gives Clara some clue, but it's not a direction she wants to take. Someone she cares about is going to die, and she only has a few months to work out who and to stop it. With her mother continuing to be cagey about her life before Clara, her brother growing a real attitude problem, and a Black Wing seemingly stalking her, Clara fears she has too many things on her plate to save a loved one from their imminent death.