The sound of unearthly voices is heard before it seems to vanish upward into the fog in an atmosphere of ominous anticipation. The voice of Dr. Jekyll is heard over the din. He speaks of duality of man and the struggle within him between his inherently good side and his evil nature. Jekyll & Hyde tells the story of Dr. Henry Jekyll, a brilliant young doctor and research scientist who, distraught over his father's mental illness, embarks upon a quest to isolate the dual elements of good and evil that are constantly struggling for supremacy inside every human being. However, when his experiment backfires, Jekyll inadvertently gives life to Edward Hyde, his evil alter ego, a murderous being who will let loose a reign of terror on the city of London and those who had ridiculed Jekyll's research.