Three years ago, Kennedy Rhodes secretly made the most important decision of her life. She declined her acceptance to the prestigious Windsor Academy to attend the local public school with her longtime crush, who had finally asked her out. It seems it was the right choice—she and Austin are still together, and Kennedy is now the editor in chief of the school's award-winning newspaper. But then Kennedy's world is shattered when she walks in on Austin kissing her best friend, and she wonders if her life would have been better had she made the other choice. The very next day, Kennedy falls and hits her head, mysteriously awaking in a parallel universe where she's a senior at the Windsor Academy. In this life, Kennedy is at the top of her class, she's popular, she has the coolest best friend, and she's practically a shoo-in for Columbia University. But as she navigates her new world, she starts to question this alternate version of herself: Is she really as happy as everyone seems to believe? Or is it possible that this Kennedy is harboring secrets and regrets of her own?