After a woman and her daughter are murdered in their rural Florida cottage, the case goes unsolved for years. Then, out of the blue, a mysterious long-distance telephone call leads investigators straight to the killer.

Prosecutor Anna-Sigga Nicolazzi revisits the case of Donna Decker who is stabbed to death by an intruder after returning home from work late on a Friday night, while her husband, father-in-law and small son all survive.

Single mother Donna Willard answers the door to a hooded gunman who shoots and kills her, while her 12-year-son watches from the top of the stairs. Anna-Sigga Nicolazzi revisits the crime and reveals how justice was won for the Willard family.

Law student Tracey Schoettlin clocks out after her restaurant shift, but she never makes it home. The next day, her body is found beneath a bridge with 19 stab wounds, the case goes cold until a man comes forward with mystical visions of the murder.

Cindy Monkman Apelt is found murdered in the Arizona desert on Christmas Eve after being reported missing by her husband. Anna-Sigga Nicolazzi revisits the crime with the detectives and state attorney who solved the case.

The town of Indiana, Pennsylvania, is rocked by the murder of Theresa Dalessio. Shot at home with her family nearby, the crime is confounding. Theresa has no obvious enemies, but as evidence emerges, suspects are revealed - including her own husband.