The Hundred Dresses – II follows the events after Wanda Petronski stops coming to school. Maddie and Peggy realize their mistake and decide to write a letter to her. When the results of the drawing competition are announced, everyone is amazed to see Wanda's beautiful artwork. The girls understand that Wanda truly had a hundred dresses and feel deep regret for their behavior. The story ends with a letter from Wanda showing her kindness and forgiving nature.