It was Christmas Eve. Big snowflakes fluttered slowly through the air like white feathers
and made all of Heavenly Valley smooth and white and quiet and beautiful. So begins the story of two orphaned sisters at Mrs. Monday's Boarding School. But nothing is heavenly for Nancy and Pamela (aka Plum): their parents died in a tragic accident years ago, they're constantly punished by the cruel Mrs. Monday, and they're all alone...