When Henry Day is seven years old, he is kidnapped by ageless beings called changelings, who leave another child in Henry's place, a boy who will be his duplicate. Haunted by memories, both boys are driven to search for the keys to whom they once were before they switched places.

From the bestselling author of The Boy Who Drew Monsters and The Stolen Child comes a modern take on the myth of Orpheus and Eurydice—a suspenseful tale of romance and enchantment In the Old City of Québec, Kay Harper falls in love with a puppet in the window of the Quatre Mains, a toy shop that is never open. She is spending her summer working as an acrobat with the cirque while her husband, Theo, is translating a biography of the pioneering photographer...