A diamond dealer navigates the culturally diverse and treacherous world of the diamond business.

Lady Rah sends Jake and Freddy to get illegal diamonds certified and ready for sale, but things get complicated when Isaac gets involved.

Jake and Freddy smuggle Lady Rah's diamonds into Vancouver, but things don't go as planned. Cam and Isaac butt heads over the direction Green & Green is taking. New evidence comes to light in the Avi Kreshman case.

The Green family comes together for a funeral, which brings long simmering tensions to the surface. A mysterious diamond dealer with ties to Cam's past arrives in LA.

While Cam and Pieter scheme to gain control of Green & Green, Ava takes a bigger role in the family business against Jake's wishes. In the wake of his father's death Freddy takes steps to get clean. Carlos hits a dead end in his investigation.

Freddy and Jake attend an underground diamond auction. Pieter and Cam meet with a Venezuelan diplomat about re-opening an abandoned mine. The U.S. Attorney's investigation into Pieter Van de Bruin causes problems in Ava's new relationship.

Jake and Lady Rah form an uneasy alliance against Pieter. Freddy and Ava work together to gain access to a Russian diamond syndicate. Cam's relationship with Sarah takes a turn for the worst.

Jake and Cam are on opposite sides after Vincent's murder brings the conflict between Lady Rah and Pieter to head; and Freddy and Ava try to turn their fortunes around in Russia.

With Pieter holding Ava hostage, Jake and Freddy must come together to save her; the investigation into Pieter begins to close in on Green & Green; Cam strikes out on his own, making a deal with the cartel.