Bonnie's life is pretty great, she has to admit: loving parents, nice siblings, lovely friends, a kind uncle … and her cool auntie is her hero. And in fact, despite grown-ups' grumbles about teens and tech, Bonnie doesn't care much for social media, or for her phone. So when she and her friends get added to the prestigious G7 chat group with some other girls from her school, she's at first amused. But then her amusement turns into irritation as the notifications stack up. Is it just Bonnie, or are the messages getting more intense, with a sharp edge? Why is G7 descending into crime and cruelty? But before Bonnie can get a handle on her social life, a family member vanishes, and irritation turns into terror. Is it a coincidence, or are her frenemies to blame? And will Bonnie's family ever be whole again?