Part 1: When Finn Wallace is assassinated, his son Sean puts a stop to all criminal business in London until he finds out who killed him. Meanwhile, unknown Wallace henchman Elliot rises through the ranks when he recovers Finn's missing driver.

Part 2: When Finn Wallace is assassinated, his son Sean puts a stop to all criminal business in London until he finds out who killed him. Meanwhile, unknown Wallace henchman Elliot rises through the ranks when he recovers Finn's missing driver.

The taps are off for all gangs in London except Asif Afridi, so frustrated Kurdish gang leader Lale decides to hit a shipment of his cows that are being used to smuggle heroin. Sean unleashes his fury after he makes a discovery about his father's murder.

Lale is asked to make an impossible decision. Will she choose her homeland or her family? Sean enacts a dangerous plan. Elliot takes on a new foe. Ed is confronted with shocking evidence of Finn's deal with Luan.

Elliot's loyalty is tested by an increasingly suspicious Ed Dumani. Sean throws a dinner in an attempt to unite the two families. Alexander is asked to meet with some of Finn's old contacts.

Hidden safely away in a farmhouse in the middle of nowhere, Darren wrestles with the chaos he has unleashed; but when a mysterious group of mercenaries set their sights upon him, will Kinney be able to get there in time to prevent bloodshed?