When a phantom stalker targets her only friend, Lacey McCrae’s crime-busting skills are tested to their limits.

With her career in tatters and her marriage receding in the rear-view mirror, ex-RCMP corporal Lacey McCrae trades her uniform for a tool belt and the Lower Mainland for the foothills west of Calgary. Amid the oil barons, hockey stars, and other high rollers living in the wilderness playground is her old university roommate, Dee Phillips. Dee’s glossy life was shattered by a reckless driver. Now she’s haunted by a nighttime prowler only she can hear.

As snowmelt swells the Elbow River, threatening the only bridge back to civilization, Lacey must make the call: believe that Dee’s in danger and get her out of there, or hope the prowler is all in Dee’s imagination and stay where she’s supposed to. When the flood hits, the pair find themselves trapped, cut off from the outside world in a pulse-pounding struggle for survival.