When the investigation of a missing girl is linked to a convicted murderer who has a past with 15 Division, it’s all hands on deck. Detective Luke Callaghan comes in to help bring the copycat abductor to justice and bring the missing girl home safely. While most of the officers are out looking for witnesses, Luke and Chris discover that the imprisoned convict himself may prove to be a useful ally in the investigation. Meanwhile, Gail is forced to confront her worst fear in order to help solve the case, pushing her recent infidelity into the harsh light of day. Back at 15, Traci is assigned to Guns and Gangs Division and must work with Steve Peck. Her emotional response to this specific case pushes her to realize that she must let go of the past and try to get over Jerry Barber. Meanwhile, Swarek and Andy work together to locate the copycat – coming face-to-face with their unspoken past and the real reason for their breakup.