The stunning landscape of Colorado’s Rocky Mountains are among our greatest natural treasures. But there are deadly secrets lurking in the craggy heights, and FBI Special Agent Kendall Beck and Denver Homicide Detective Adam Taylor team up to investigate a kidnapping. When Taylor’s niece, Frankie, suddenly vanishes at a local hockey rink, it’s clear that there’s a predator on the loose --- and now, the case has turned personal. One discovery after another leads Beck and Taylor closer to the truth, as they close in on the devastating truth about the fates of the missing girls --- and the many who came before them. Will they be able to find Frankie before it’s too late?

The only survivor of Denver’s notorious “Reaper” serial murders, FBI Special Agent Kendall Beck grapples with the ghosts of her past by seeking justice for victims of abuse. She’s neck deep in a particularly ugly case involving the disappearance of five-year-old Emily Williams. But her investigation is derailed when her best friend and roommate, Gwen Tavich, turns up dead floating in a nearby lake. Devastated by the news of Gwen’s death, Kendall teams up with Denver detective Adam Taylor to find the killer. With every new clue, Kendall questions how well she really knew her friend. And when Gwen’s dark secrets begin spilling out one by one, she begins to understand the devastating magnitude of her murder.