Detective Sam Porter

Brilliant. Complicated. Psychopath. That's the Four Monkey Killer, or 4MK. A murderer with a twisted vision and absolutely no mercy. Detective Sam Porter has hunted him for five long years, the recipient of box after box of grisly trinkets carved from the bodies of 4MK's victims. But now Porter has learnt the killer's twisted history and is racing to do the seemingly impossible - find 4MK's latest victim before it's too late....

In the midst of one of the worst winters Chicago has seen in years, the body of missing teenager Ella Reynolds is discovered under the surface of a frozen lake. She’s been missing for three weeks...the lake froze over three months ago. Detective Sam Porter and his team are brought in to investigate, but it’s not long before another girl goes missing. The press believes the serial killer Anson Bishop has struck again, but Porter knows differently. The deaths are too different. There’s a new killer on the loose.

For Detective Sam Porter, the words "Father, forgive me" conjure memories long forgotten; a past intentionally buried. For Anson Bishop, these three words connect a childhood to the present as he unleashes a truth concealed for decades. Found written on cardboard near each body, these words link multiple victims to a single killer - discovered within minutes of each other in both Chicago and South Carolina - clearly connected yet separated by impossible miles.