Can Nancy solve this chilling mystery? Who wears a blue scarf and old rubber boots, and has broccoli for a nose? It's Sherlock -- Nancy, Bess, and George's snowman The girls are thrilled to be on winter vacation and take part in all of the season's activities Nancy's friend Deirdre has even transformed herself into Madame Chocolata, a fortune-teller who predicts the future by reading hot cocoa marshmallows But the wintry days get a little too chilly...