In 1978, a shocking murder in broad daylight terrifies a small Illinois town. It goes unsolved for years until an elite team of investigators uses cutting-edge technology to dig up new clues and lay a cunning trap to catch a killer.

In June 2001, just outside Rockford, Ill., a welfare check leads police to a woman brutally murdered in the basement of her once quiet suburban home; the hunt for her killer will lead detectives to a mystery that has been buried for over 14 years.