A sniper shooting on an Alaskan highway leaves a young man dead and a community running scared. 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, California, targeting the homeless. Also, a young man stands accused of murdering his family. Investigators must race to find the crucial link between the cases: can they catch the predator, and free an innocent man?

When butchered bodies show up across California, investigators realize they're dealing with a depraved serial killer. With a kill list in hand, he's hunting for victims, keeping a macabre audio diary as he goes. No one knows where he is or if he'll stop.