Helen is away at a prestigious music camp, practicing her violin for all she' worth, when some ... interruptions come along. Namely, werewolves fighting against the faery folk for control of their forest. Before long, Helen is involved, though her "help" just seems to makes things worse, and most of her ideas backfire. When a child is stolen from a home nearby, she realizes how much is at stake. She will do anything to bring back this boy, even if it means making a deal with the Faery Queen herself.
Strong second in the "First Aid for Fairies" series. The ending was a bit predictable, but getting there was still fun.