An action-packed crime drama about a police unit that specializes in cross-border crimes and brings global criminals to justice. Since globalization, some countries have opened barriers to ensure easy trade, travel and cultural diversity. But this openness has provided criminals with ways to exploit the system and threaten global safety. So much so that a special kind of law enforcement team created by the International Criminal Court (ICC) to combat global crimes, this is the story of "Crossing Lines." This elite team of five international cops must face bureaucratic, jurisdictional and cultural obstacles while working to solve the most notorious international crimes.
Six months after the season two finale, Michel Dorn has to bring a new team together after one of his prosecutors goes missing. Sophie Baines, Dorn's second at the trial of Wombosi, is kidnapped. Her driver is killed. New evidence she had dug up is challenged. Only she knows where the evidence came from. Dorn's investigative team has been disbanded. He puts together a new team to find Sophie.
New leads suggest Wombosi is not behind the murder and kidnapping. Rather the person who gave Sophie the evidence is the real target of a much more complex plot.
The cross borders unit investigate the death of a bus driver and student of a prestigious European school.
The Cross boarders unit travel to Italy to investigate the assumed assassination of a prestigious judge.
A killer who escaped justice on a technicality has moved close to the Hague and started killing people. Marco who investigated the original case is incensed, but then the case takes a strange turn when the killer is murdered.
A known criminal has been knifed, but he dies instead of a deadly contagious disease. The team tries to track down all who had contact with him. The man who knifed him and his criminal partners of course do not want to be found.
A thinly clad girl wandering outdoors falls from a bridge. She survives, but is in such shock, that she cannot speak. The team believes she escaped from sex traffickers who have long been sought by the ICC.
Polonium 210 is stolen from a British nuclear plant. An elderly former colleague of Dorn joins the investigation. He provides useful expertise, but clashes with Carine regarding the direction the investigation should take. During the search for the cargo of lethal polonium Carine faces a former researcher at the school, and make her question her ability to lead the ICC.
The investigation on the death of key figures of a controversial Hydro-Electric project exposes the secret life of a contractor.
When the locker room of a football team is bombarded, the research leads to a racist motive and exposes a dark secret of the profitable owner.
The mysterious death of a journalist who is about to give an exclusive to Dorn’s unit has to do with the world of drug, counterfeit and terrorist weapons.
The former Russian secret agent Valentina Michailova murdered the Press officer of the right-wing of the Freedom Romanian Party with a garrote. Since her motives are very personal, the ICC have to hurry to catch the professional killer. Her next victim is Solbak, the head of the Party. Marco makes a new step in the investigation of his missing sister.
Genovese returns to New York and becomes involved with human trafficking.
The team hunts a sniper who is randomly killing innocent people.
A string of teen suicides that may be linked to Internet bullying are investigated.
A German biker gang embarks on a home-invasion spree. Meanwhile, Sebastian goes undercover for the first time.
As Genovese awaits trial, he offers the ICC an attractive bargain.
Louis' and Rebecca's lives hang in the balance. Meanwhile, Dorn tries to take down Dimitrov.
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.
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.