The year is 1999, and thirteen-year-old Elliot is a self-appointed "diet coach" who teaches her classmates how to survive on one stick of gum a day to get heroin-chic, Kate Moss thin. Elliot is obsessed with her best friend and former "client" Lisa, who is fresh out of inpatient treatment and dating a nineteen-year-old drug dealer. Meanwhile, Elliot's mother Anna, a capricious poetry professor, has a drug addiction and eating disorder of her own...