Another gruesome mutilation murder and this one ties back to an older case through Irene Ziegler. Martin looks into why a judge asked for him to be placed on this case and another clue leads him back to Toulouse. Martin keeps the information about Diane/Helene from the clinic, but warns her of the danger she faces.

The lists of suspects and victims continues to grow with some names on both lists! Irene goes on her own to pursue some clues of special interest to her. How long can Diane/Helene keep up the charade, especially with her father in town and worried?

The list of conspirators doing the bidding of Hirtmann, also grows. Another disturbing video gives proof of a fourth suspect in the ring of serial rapists, but there are still some unexpected surprises.

It is now a race against time to discover who the fifth person is and to save another life. Martin finds himself once again faced with making an impossible choice.