Hobgoblins kidnap Henry Day when he is 7 years old, leaving an imposter in his place. Each Henry tries to adjust to his new life. Living in the forest with other stolen children who are also waiting to switch places, the 'real' Henry struggles to piece together fragmented memories of who he was. Meanwhile, the 'imposter' continually fears discovery and cannot forget that he is living a life that doesn’t belong to him; he eventually seeks out the truth of who he was before he too had been stolen and exiled to live in the forest as a hobgoblin (long before he stole Henry's life). Their quests to each recapture their true identities eventually converge.

Very interesting story of the Changeling myth and the struggle to discover and shape our identities as we move from childhood to adulthood.