After losing their beloved mother, the Devlin sisters need each other more than ever. Single parent Louise is trying to help her fragile young daughter to navigate life. So, when the nine-year-old insists on finding out who her father is, Louise organizes a sisters' outing to track down her Italian one-night stand. Meanwhile, due to her teenage sons' sporting success, mother-of-four Julie is anointed Cook-Bottlewasher-and-Cheerleader-in-Chief for the rugby parents' WhatsApp group. Worst. Job. Ever. Finally, glamorous Sophie is determined that her daughter Jess won't be boy-crazy and image-obsessed like she was. But when things go horribly wrong at a teen party, Sophie and her sisters are forced to take drastic measures to protect Jess's future. Squeezed from every side, Louise, Julie and Sophie want to be good sisters - but sometimes that's easier said than done.