Tommy is finding the transition to his job with the Unit a difficult one. The team follows every move made by drug dealer Xavier, hoping he will lead them to someone bigger. But when he meets with a rival dealer things go very wrong.

Roach is feeling the pressure and so turns to a new supplier known as The Viking. However, the Unit are already monitoring the terrifying and ruthless Viking. An old friend of Ash puts her life in danger trying to assist him.