In a remote mountain valley in British Columbia, a human monster preys on innocent lives. After teenagers discover the body of a missing girl in Chalk Valley, searchers find the remains of two more victims secreted deep in the woods. A serial killer is at work. Chalk Valley police detective John McCarty is picked to lead a task force to find the murderer but inexperience, politics and McCarty's own inner demons quickly overwhelm him and the investigation falters. Meanwhile, on a dark, lonely highway many miles away, RCMP Sergeant Dave Kreaver comes across a van crashed at the side of the road. The driver is anxious to leave the scene but Kreaver discovers an unconscious teenaged girl in the van. Kreaver feels in his gut that the driver could be the serial killer everyone's looking for, but his inquiries are ignored. The task force is in well over its head, buried by thousands of leads and potential suspects. Kreaver’s supervisors tell him to back off and let the task force do its job. Kreaver is in a deadly cat and mouse game with a murderous psychopath, a race against time with innocent victims in play. Operating alone and without official sanction, can he stop the Chalk Valley Killer before he claims more lives?