Fired from a job she hates, Dr. Joy Gilbert returns to her small hometown to find her former fiance single, her once vivacious mother struggling financially and physically, and Tressa, the daughter of the boss who just fired her, popping out of the back door of her car. Tressa refuses to return to the city, where her divorced parents struggle emotionally over the death of their son. Dr. Zack Tyler hires Joy, and when Tressa begins having blackouts they uncover a rare genetic defect.