The masked killer is still at large, and Chandler is particularly interested in a woman who managed to survive an attack. He and Miles must resolve their differences to brink the killer to book.
A dangerous inmate escapes from a psychiatric unit. When a babysitter is murdered, Chandler fears that a masked spree killer is at large in Whitechapel.
Dr Llewellyn establishes that the dismembered remains show traces of cantharidin, the poison and sometime aphrodisiac Spanish fly.
DI Chandler and the team attend Miles's daughter's christening. Elsewhere in Whitechapel, a fox is seen with a human arm in its mouth, and other body parts are washed up from the Thames.
Following on from the incident at the tailor's workshop, a second mass murder occurs, and again there was no obvious break-in and no forensic evidence.
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.