DI Chandler and DS Miles investigate the slaughter of four people at a tailor's fortified workshop. Ed Buchan, retained by Chandler as the team's historical adviser, believes that the huge archive at Whitechapel station will provide the necessary insight into this baffling crime that appears to echo the Ratcliff Highway murders two-hundred years earlier. (Part 1 of 2)

Part 1 of 2. When Chandler, Miles and the team attend the christening of Miles's daughter, Martha, a fox runs through Whitechapel with a human arm inside its mouth. Soon, more body parts from the same victim are washed up by the river.