A young mother's lifeless body is found floating deep in the Louisiana bayou, and local police are stumped as to how she wound up dead nearly 300 miles from her Texas home; there is little physical evidence, and there are no eye-witnesses.

After Lisa Fein disappears from her rural Michigan home, her young son tells police he saw her being attacked by a man in a snowmobile helmet; after a three-day search, Lisa's body is found in a shallow grave; police set their sights on three people.