The Hammersley and its crew monitor Penfold Island near the Red Reef Oil Fields where the oil smugglers have based their operation. When they cannot contact their Army lookout on the island Kate leads a crew onto the island where they find the dead lookout. Spider and Kate are attacked by the assailant but Kate recognises him - Campbell Fulton. Fulton escapes by jetski. Mike pursues the Robsens but they say Fulton was sacked by them weeks previously. The Hammersley intercept a call from Robsens ordering that Fulton be silenced. Mike orders that the Hammersley shadow the Robsens boat. NavCom then informs Mike although Penfold Island is now under federal monitoring the oil tank is emptying. The Hammersley find Fulton's dive boat with Fulton in the water and he is taken into custody on the Hammersley. They trace the oil connection to an abandoned fish farm where the Robsens are winding up their operation and taking the remaining oil out by road. Nikki questions Fulton and finds out that ...