Beneath the prim and proper morals of Victorian society lurks a violent madman who emerges at night to commit the most cold-hearted of crimes. Nothing is known of him except his name: Mr Hyde. A lawyer and a doctor begin their own investigation and are shocked to find that Mr Hyde is an acquaintance of their respectable friend Dr Henry Jekyll. Worse still, Dr Jekyll is unwilling to listen to them and retreats into his laboratory when confronted. As months turn to years and the violence turns to ruthless murder, Dr Jekyll is finally forced to confront the chaos.