The family has gotten a piano, and Mabel, organized and diligent as ever, is happily taking lessons and practicing faithfully every day. Five-year-old Violet is not pleased that their parents think she is too young for lessons. When she learns that Mabel is going to play in a concert, she wants to join in the fun. Will Violet ruin her sister's big moment? And can she understand that some things are more satisfying without magic?