In 2011, Detective Christopher Lyons picks up a 25-year-old cold case file, hoping to solve a murder that many see as a tragic miscarriage of justice.

In 1997, in quaint Anne Arundel County, Maryland, a detective inherits a stack of cold cases. As he begins to unravel each one, he uncovers a shocking common thread.

One night in 1993, an officer is shot and killed during a routine traffic stop. The only witness is his young nephew who is too scared to tell police.

In 2007 in Bethany, Oklahoma, a young pregnant woman goes missing. Police retrace her last steps and unearth more than the secrets she harboured.

In 1996, Tulsa, Oklahoma, a mother is found dead on the side of a rural stretch of highway in an apparent hit-and-run accident. What will the police uncover?

A family is torn apart when a mother in Florida goes missing. The case stumps detectives, who believe that only the woman's three-year-old son knows the truth.