After multiple homicides occur along Virginia's Colonial Parkway, Authorities task Det. Danny Plott with finding a serial killer. When investigators uncover a pattern at the crime scenes about the killer's method, it becomes the key to solving the case.

Jacksonville deputies locate the bones of a missing woman. As Det. Mechelle Soehlig pieces together the victim’s final steps, a trail of clues lead her from the site of a late-night house party to a mysterious Icelandic biker known as “Viking.” English

After someone abducts a vivacious Ohio undergrad in broad daylight, local police join forces with the FBI. The discovery of blood-soaked evidence kicks the case into high gear and brings investigators face-to-face with the depths of human depravity.

Two brothers from Michigan search for buried treasure on Oak Island off the coast of Nova Scotia.

A mother's charred body leads detectives to a wolf in sheep's clothing.

In rural Minnesota, a masked murderer bludgeons an entire family in their sleep; as small-town secrets unravel, Sheriff Mike Gormley uncovers a dangerous love triangle and a vengeful killer who is willing to risk his own blood for retribution.

After someone executes a charismatic New Hampshire businessman in his sleep, the case goes ice cold; detective Robert Freitas uses his wits and a wiretap to outsmart a deceitful associate who believed he'd long since gotten away with murder.

A series of murders puts the residents of a small town on high alert; as bodies continue to pile up, the urgency escalates, pitting Detective Dave Frankel in a race against time to capture a deranged spree killer before he claims his next victim.