A sniper shooting on an Alaskan highway leaves a young man dead and a community reeling. As one family grieves, another becomes hell-bent on revenge as they formulate an audacious plot.

It's Christmas when a stranger walks into Deanna's grandmother's home, holding them hostage. On the run, he's left a bloody trail in his wake, borne from his obsession with a young mother. Realizing he's armed, they fear they might be his next victims.

Nancy and her children are found dead in an apparent murder-suicide. Fifteen years later, Donna falls to her death in the Grand Canyon. But investigators discover they're linked and are confronted by a serial killer who's been lying in wait for decades.

A serial killer stalks Orange County, CA, targeting the homeless. A young man stands accused of murdering his family. Investigators race to find the crucial link between the cases: can they catch the predator, and free an innocent man?

A brutal attack seems isolated, but investigators soon discover it's only the tip of an iceberg. Acts of revenge, serial killings and twisted webs of deceit leave communities in fear as revelations stack up to reveal these real-life devils in disguise.