When Poppy arrives home to find her husband and best friend sitting side by side at her kitchen table, she thinks they're planning her a birthday surprise. Little does she know, they're waiting to tell her about their affair. And worse, that they're having a baby. Now everywhere she goes, mothers are reminding her of their betrayal. So when Poppy meets a woman who wants to help her fight back, it seems like a good idea. But how well does she know her? Is she there to help . . . or does she have an agenda of her own?