A disabled former NYPD detective joins a team of specialists working for the International Criminal Court. While trying to juggle his own personal demons, he must to corner a psychotic killer.

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.

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.

Louis' and Rebecca's lives hang in the balance. Meanwhile, Dorn tries to take down Dimitrov.

Genovese returns to New York and becomes involved with human trafficking.

The team goes after a gang of black widows who seduce wealthy men into marriage and then poison them.

A string of deaths are traced to toxic cocaine in London.

The gang escalates their deadly rampage. Meanwhile, the team deals with tragedy and deception.