Meanwhile, Tommy follows the trail of the serial killer's earlier victims and Hickman must face his demons in time to find the missing team member. Elsewhere, when Sebastian tracks down the killer the team must race to apprehend him but a sudden tragedy changes the teams' lives forever.

An abandoned car leads Sebastian and the ICC team to Poland where technology reveals a shocking secret. The investigation uncovers a bizarre scenario in which families are pitted against each other in a fight to the death. When Eva and Tommy go undercover, their lives are in peril, and it's up to Hickman and Louis to reach them in time.