Marty Johnstone's criminal career gets a boost when he makes contact with a supplier of Thai cannabis sticks. With his new business associates, Terry Smith and Big Ari, he builds a drug empire. Detectives Charlton & Derwent help with Marty's arrest.

Marty tries his luck in the tough London criminal scene, setting up the smuggling of 75,000 LSD tabs. The Syndicate becomes more organised as Detectives Charlton & Derwent are assigned to the Special Investigations Unit.

Andy and Marty arrange their first big blue-water shipment out of Thailand. The SIU has major setbacks with building a case against the Syndicate and Josh Easby, a reporter at the Auckland Star, realizes he may be onto something big.

Marty is living the high life, but his addictions to drugs mean that mistakes are being made. Terry Clark begins plotting to cut Marty out of the New Zealand drug market. Ben and Carole are frustrated by the powers-that-be, and the drug war gets personal.