Tommy follows the trail of the serial killer’s earlier victims When Sebastian tracks down the killer the team must race to apprehend him but a sudden tragedy changes the teams’ lives forever.

Detective Eva Vittoria discovers a pattern of murders when wealthy businessmen begin dying from a mysterious virus and the ICC team’s investigations lead them to a group of art thieves. Meanwhile, a confrontation with the killer puts the whole team’s lives in jeopardy.

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.

When a wealthy teenager is taken hostage, the ICC team has to move fast to track the kidnappers. Meanwhile, Anne-Marie finds a connection to a similar case in Florence as the team races to rescue the boy. Elsewhere, Dorn and Louis soon discover an unexpected link to their arch enemy Alexander Dimitrov, which puts their lives in danger.

While in Florence, Eva finds something amiss when she discovers another similar kidnapping. While confronting her former partner in the Italian Police, a secret is discovered that may put Sebastian's career at risk. Back in Cannes, a search of the financial records from the missing boy's father shows that not everything is as it seems.

Hickman's search for a criminal mastermind leads him to a bank where he is suddenly taken hostage and soon realizes that the thieves may not be after the money. Outside the bank, the ICC team must work against time to figure out the real motive behind the crime and when part of the truth is revealed, Tommy must confront a secret from his past that could jeopardize his career.

When Anne-Marie is away working on an old case, the ICC team must figure out the reason behind a series of shootings in Italy and Slovenia. Meanwhile, two young men have stolen money and drugs from an Italian drug lord and unknowingly kidnap the drug lord's daughter. Eva's past family connections to the drug lord reveal hidden details from her past which may be able to help save the girl.

Louis and his wife, who have never recovered from the death of their son at the hands of arch enemy Alexander Dimitrov rely on Dorn, who discovers new information that may lead to the capture of the Russian. Meanwhile, a woman is found dead and another missing, and all the evidence points to Hickman prompting Tommy and a Dutch detective to track down who framed him. Elsewhere, Louis returns home to a shocking discovery.

Hickman's life hangs in the balance and he is forced to find a way to survive. Elsewhere, Sebastian and Eva search for Anne-Marie, who has not returned from Italy. Meanwhile, Eva must reveal that she has broken her trust with Sebastian and that his personal secrets could be exposed. Dorn may have tracked Dimitrov, which in the process leads to many mysteries being solved.