In Cincinnati, Detectives Keith Witherell and Bill Hilbert attempt to crack the code of silence surrounding the death of a 28-year-old man gunned down on Main Street. In Dallas, Detectives Mark Ahearn and Robert Quirk work quickly to solve the murder of an aspiring social worker who risked her life by reaching out to help a two-time convicted killer.

In Dallas, Detectives Scott Sayers and Ken Penrod are investigating a home invasion that left a young man dead. Is their suspect just a young suburban mom, or a criminal mastermind? And in Cincinnati, a brutal stabbing ends the life of a hard-working grandfather. After interviewing a series of family members, Det. Jenny Luke finds out that her suspect may be closer than she initially thought.