Thirteen-year-old Callie is accused of bullying at school, but Rebecca knows the kind and gentle girl she’s raised is innocent. While Callie is eventually exonerated, threatening notes from her alleged victim, Robyn, begin to surface, and as the notes become suicidal, Rebecca is determined to save the unbalanced Robyn. As Rebecca navigates school disapproval and mean moms while trying to comfort Callie and help Robyn, she recalls her own intense betrayals and best friendships at that age.