Capitani considers a lucrative job offer as he crosses paths with a connection from his past. Lucky hits the streets. Valentina meets with the Koenigs.
Gibbes Koenig joins forces with Valentina to combat a Nigerian drug gang. Luc tries to organize a coup, but needs Elsa's help, but Elsa calls him a crook and refuses to work with him. Luc's relationship with his boss Cojocaru starts to collapse.
Capitani helps Lucky view the body of his sister in return for information on the drug operations around Luxembourg City station. Toni is mistrustful of Luc and forbids Bianca from spending time with him, but agrees to accompany Luc on a trip to the forest to meet with a dealer.
Luc discovers his former lover Carla Pereira is supplying the Nigerians with drugs. She asks him to leave her alone. Elsa and Toni spend the night together but try to continue working together. Luc seeks assistance from his sister Jeanne, but the siblings' relationship has been rocky since the death of their father. Pascale Cojocaru realizes that something is hindering Luc's release.
Capitani organizes an attack on a Nigerian mafia drug shipment. Cojucaru promises Luc his freedom if the operation is successful and if Arthur is taken into custody. Luc forces Carla to participate in the attack. Lucky asks Bianca for help finding Grace. Elsa suspects that Luc is working undercover.
Arthur is found dead, while the drug shipment has disappeared. Lucky is imprisoned by Queen as he represents a risk to the operation. Valentina forces Gibbes to withdraw from the business. Cojucaru is unsuccessful in securing Luc's full release, although he has earned her trust. Luc decides to work for Valentina.
Elsa and Luc suspect that Carla is behind the drug shipment's disappearance. Protesting her innocence, Carla reveals significant information about drug dealings at the "Grand Huit" cafe, which Luc passes on to Elsa. Grace tells Bianca that Dominik tried to kill her. Bianca demands an explanation from Dominik.
Valentina takes over Gibbes' business, and thanks Luc for sorting the problem with the Nigerian dealer. Elsa observes that the drug traffic is continuing to operate. Bianca wonders where her former friends are getting their cash flow from. An injured Lucky seeks to return to the city. Luc and Elsa talk for the first time.
Cojocaru locates Luc's service weapon in Manscheid lake and returns it to him. Luc must confront his inner turmoil. Elsa and Toni monitor the prostitutes at the station, but Toni seems to have other plans in mind. Luc takes Lucky in, and Bianca finds Grace's address.
As Capitani pieces together the truth behind the drug theft, a plan to reunite Lucky with Grace leads to a showdown that tests loyalties and risks lives.
