When a bomb goes off inside a waterfront restaurant, it is discovered the owners are being blackmailed. The detectives go undercover in the restaurant to try and learn who the extortionist is and it is Holloway who is given the task of delivering the bag of cash. In a tense operation, he criss-crosses the Harbour following the extortionist’s instructions before making the final drop-off. But the extortionist is smarter than anyone thought and his capture isn’t going to be simple. Tayler gets her first taste of action on the water before being relegated back to desk duty by Sergeant Blakemore.