Ever since her sister, Agnes, died, Pearl has a tradition every time it snows. She makes a person out of snow. A snow sister. It makes Christmas feel a little less lonely.

On Christmas Eve, her father receives a letter about a long-lost relative's will. Is their luck about to change? In anticipation of a better Christmas, Pearl goes to beg credit at Mr Noble's grocery to get ingredients for a Christmas pudding. But she is refused, and chased down the street where she is hit by a hansom cab. The snow is falling so hard that they can't take her home. She'll have to stay at Flintfield Manor overnight, in a haunted room... Will Pearl make it home for Christmas?