Alison Wynn is an amateur triathlete who convinces Dr. Laura Stevens, a controversial peak-performance trainer, to take her on as a client. Together they embark on a rigorous program combining cutting-edge physical training with experimental hypnotherapy in an effort to render Alison more competitive. Pushed to her limits and forced to explore the painful repressed memories of her mother's suicide, Dr. Stevens' punishing regimen helps Alison post impressive gains and break through her own glass ceiling; but at what cost?