After a gloomy, gray week stuck inside at school, Nancy comes up with a great idea to cheer up her friends. Ms. Glass's classroom will celebrate a new holiday—Fancy Day! Everyone gets into the swing of things, practicing their manners and preparing for the party. But on the day of the celebration, Ms. Glass runs in late . . . looking quite plain. Can Nancy and her classmates doll up Ms. Glass and keep the party as elegant as expected?