A diamond heist triggers a dark dive into Europe's criminal underworld.

Naomi goes to Belgium to question a lead who is behind bars, while Milan tries to get the diamond money to pay for his brother's heart operation, and Khalil interrogates the victim of a home invasion.

Khalil discovers his brother is involved in a smuggling ring, while Milan makes a noble decision which could have terrible personal consequences.

Milan tries to get back to Belgrade before Zlatko can harm his brother, while Khalil strikes a deal with his sibling. Elsewhere, Naomi pursues the diamonds, but when she discovers a damaging connection between the missing rocks and the airport project, she struggles to get Tom to take her findings on board.

It is 1995 and war-torn Bosnia breathes in the uncertain safety of a delicate ceasefire, while Naomi and Milan's significant past is revealed.

Naomi tries to protect a vengeful Milan, while Khalil and Mokhtar find themselves in deep trouble.