For five centuries, a witch's curse has bound the trolls to their city beneath the mountain. When Cécile de Troyes is kidnapped and taken beneath the mountain, she realises that the trolls are relying on her to break the curse. Cécile has only one thing on her mind: escape. But the trolls are clever, fast, and inhumanly strong. She will have to bide her time... But the more time she spends with the trolls, the more she understands their plight. There is a rebellion brewing. And she just might be the one the trolls were looking for...