After rescuing Tomas from enchantment, orphan Seren Rhys is enjoying her first summer at Plas-y-Fran. But as autumn arrives, it brings with it a mysterious new governess who seems intent on drawing Tomas away from Seren and his family. Dangerous figures from a bewitched toy carousel stalk the house and, fearing the worst, Seren calls on the clockwork crow to help her.