High school freshman Shaun Ouillette vanishes the day after a snowstorm; an anonymous letter leads detectives into the frozen woods, where they make a discovery that will tear the small town apart.

Kay Weden finds her mother inexplicably murdered inside her own home. Then, investigators discover the frozen remains of her boyfriend in the icy peaks of Blue Ridge Mountains. Only by speaking with Kay do investigators realize she's being stalked.

Noel Alkaramla, 21, vanishes just before Thanksgiving; investigators interrogate Noel's girlfriend and many others, but the answers can only be found in the icy depths of the Hudson River.

After Christmas shopping, 18-year-old Linda Velzy vanishes into upstate New York's frozen landscape; the primary suspect refuses to talk to detectives, so Linda's father hatches a plan, but temperatures are dropping, and time is running out.

Seventy-four-year-old widow Virginia Johannessen is shot dead in her home; then, another widow is murdered on the same street; as police unravel the truth, they discover they've made a chilling mistake.

On a freezing Minnesota night, a shooting leaves a young police officer fighting for his life by the roadside; as his wife awaits his fate, a heart-stopping manhunt ensues.

A woman and her two young children go missing, then two other boys also disappear, prompting investigators to ask whether there's a serial predator on the loose in the wintry landscape of rural Missouri.

A pastor finds bartender Robbie Schmidt strangled in the snow shortly before Christmas; Robbie's family is shocked when suspicion falls on his closest friend.

In the middle of a cold January night, a family of four is murdered in their home. As fear grips the small town of Evansville, Indiana, detectives launch a desperate manhunt for a deranged killer. But will they be too late?

After a blizzard, a son visits his parents, only to find them murdered. A peculiar local might know what happened during the snowstorm.

Weeks after the Christmas disappearance of 22-year-old Dean Fawcett, detectives discover a headless body in the snow; a handwritten note points to a dangerous set of suspects, sending investigators on a cross-country manhunt to unravel the truth.

A teenage couple disappears from a Colorado neighborhood in the middle of winter; their car turns up abandoned and burnt in a field and everyone is looking for answers, but the winter's thaw reveals the truth.