When a key suspect vanishes it casts an ominous shadow over the investigation. PJ and Linus attempt to piece together what happened the day that Tommy Burke disappeared. In his attempt to help the suspect, PJ makes a dangerous decision.

One month has passed and the cold case is revived when another body is found.

When PJ uncovers the truth behind the body, Duneen is changed forever. No longer able to turn a blind eye to those around him, PJ attempts to bring the killer to justice.