According to Sex Addicts Anonymous over four million British adults are addicted to sex. TV presenter Ulrika Jonsson authors this revealing documentary, meeting with experts and therapists in America to learn more about the illness and to establish exactly what defines a sex addict. As the investigation progresses, Ulrika's search for answers soon becomes a very powerful personal journey and she discovers that possible sex addiction is not just about needing sex every minute of the day, or obsessive masturbation, but far more complex and subtle.