Fourteen-year-old Irene Sauvelle moves with her family to the coast of Normandy. There, she meets a local boy named Ishmael, and the two fall in love. But a dark mystery is about to unfold, involving a reclusive toymaker who lives in a mansion filled with mechanical beings and shadows of the past. Strange lights shine through the fog surrounding a small, barren island, and then a young girl is found murdered. Irene and Ishmael try to piece together the many mysteries and secrets hidden in a town torn apart by tragedy.