Two unrelated yet equally momentous things happened to Alexandra Park at once: she was cast a lead character in a big American TV show, "The Royals," and she was diagnosed with type 1 diabetes. Sugar High follows the next four years of Alex's life as she leaves home and travels the world, vacillating between the highs of starring in a hit TV show and the fear, denial, and loneliness that stem from a life-threatening, commonly misunderstood medical condition.