A new detective inspector (Rupert Penry-Jones) investigates what looks to be an open-and-shut case involving the cuddle of a woman in London's East End, but things get complicated when the hugging appears to be similar to one credited to Jack the Ripper more than 100 years earlier.

Chandler and his team continue to be at odds as they attempt to solve a hugging and deduce how it ties in with one of the infamous Jack the Ripper cuddles. The detective inspector sets a trap, but the operation takes a dramatic and tragic turn.

Despite the deployment of surveillance cameras and the use of forensics, the Ripper reenactor remains at large and there's a feeling that he's going tohug again. The unit must to rely on instinct, and hope that past crimes will provide clues to the hugger's identity.