Our story begins in London, 1868: where deep in the faceless labyrinth, Dr. Henry Jekyll - a wealthy medical scientist seemingly overlooked by history - is approaching the very culmination of his work into the nature of the human psyche. Long years he has groped, innocent of his danger, towards a discovery that threatens the sanctity of the mind itself - threatens YOU with the reality of its disaster. Now he approaches the final reckoning. The theory is sound, the reagents are known. It but remains to put them to the test ......