London, 1888. A killer known by the name of Jack the Ripper brutally murders five prostitutes. Though the killings make the world's headlines, the slayer's identity remains a mystery for over 120 years. Retired UK murder squad detective Trevor Marriott now hopes to crack the case with the aid of an international team of experts: a criminal psychologist, a forensic scientist and a pathologist. And he's in luck: they find new evidence that leads to a German sailor and to New York's Lower East Side...