After rescuing Tomos from enchantment, orphan Seren Rhys is enjoying her first summer at Plas-y-Fran. But as autumn arrives, it brings a mysterious new governess intent on drawing Tomos away from Seren and his family. Dangerous figures from a toy carousel stalk the house and, fearing the worst, Seren calls on the clockwork crow to help her. But can he reach her in time? Will Tomos be able to escape the Velvet Fox?