Tom finds himself suffering with same problem as the infamous Dr Jekyll and battles to keep his family safe from the alter ego locked inside of himself.
Tom is desperate to keep his children safe from the being within himself but he finds it difficult to ignore the voices he is hearing.
Tom wakes up to find blood all over his hands, and worries that that his alter ego has emerged and done something terrifying during the night.
Tom finds himself a captive at the hands of an organization that has been planning its moves for over a hundred years. Meanwhile, Tom's marriage to Claire, the birth of their twins under impossible circumstances, and the first emergence of Hyde are recounted.
Tom learns more about the legend of his ancestor and how his origins have been forgotten until now.
In a basement of an old country house Claire learns the disturbing truth about her husband.