Lila doesn't just want to be a Firework-Maker's daughter, she wants to be a Firework Maker herself. But although she's learned a lot she still must get through the most difficult and dangerous part of her apprenticeship - and her father won't tell her what it is.In search of this final Firework-Making secret, Lila heads off alone on a journey. It is a journey filled with dangers beyond anything she could have imagined, a journey on which she will learn so much more than the one secret she set out to find...