Fifteen-year-old Ivy's world is in flux. Her dad has moved out, her mother is withdrawn, her brother is off at college, and her best friend, Anna, has grown distant. Worst of all, Ivy's body won't stop expanding. She's getting taller and curvier, with no end in sight. Even her beloved math class offers no clear solution to the imbalanced equation that has become Ivy's life.
Everything feels off-kilter until a decision to change the way she eats gives her a boost in confidence and reminds Ivy that her life is her own. If she can just limit what she eats—the way her mother seems to—she can stop herself from growing, focus on the upcoming math competition, and reclaim control of her life. But when her disordered eating gives way to missed opportunities and a devastating health scare, Ivy realizes that she must weigh her mother's issues against her own, and discover what it means to be a part of—and apart from—her family.