New Girl

Three girls - Atarah, Cadie and Lyla have been the best of friends since they were young. Atarah is then asked to look after the new girl in school, Melodie. Melodie finds it difficult to settle in and the three girls' friendship is tested. As well they learn what it means to be a true friend.
Do Melodie and she have more in common than Atarah thinks? Can all four be friends together? What does it mean to be a true friend to everybody? Will Atarah and Melodie be friends forever?