Mia is on another Mission! Mia, along with Granma Betty, is trying to make things better for their town by going door - to- door to help the sick, elderly, and the poor... until Grandpa Betty catches a bad case of the blues! Mia has to figure out what to do. She must do what no girl in her school has done before, and she faces obstacles. Will Mia stand up for what she believes in and have the courage to make a change, even if she is only in third grade?