Cardinal finds evidence that may prove Catherine was murdered, but he’s sidetracked by a development in the Island Road case.

As Cardinal struggles in the wake of his wife’s suicide, Delorme becomes lead detective on both a double-murder and a string of muggings.

Armed with new evidence, Cardinal and Delorme make a break in the case that could explain the motive behind the murders.

Cardinal and Delorme uncover the identity of the Island Road killer and link the double homicide to the ATM robberies.

Cardinal and Delorme struggle to identify the victims, unaware that there is a witness to the crime, who is being stalked by the murderer.

As Sharlene and her family hold Lloyd Kreeger captive, Cardinal and Delorme flush out an unexpected ally in their search for the killers.