This time, Jack the Ripper has messed with the wrong girl... During the height of the Ripper Murders, eighteen year-old Katherine Kelly arrives from Wales in search of her older sister, Mary. When the Metropolitan Police refuse to help her, she takes matters into her own hands. Combing the seedy alleys of Whitechapel, Constable Edward Stanhope searches for the notorious killer terrorizing his beat. Joining forces, Edward and Katherine soon discover the closer they come to finding Mary, the closer they come to finding Jack.