The Nemesis crew come across a man attempting to bury the body of his murdered brother-in-law but the story he eventually tells the detectives does not match the evidence at the crime scene. Terry and Dave deal with two best friends who have been plundering a shipwreck. Both Helen and Jeff are passed over for the vacant position of Patrol Commander. Knocker is called out to negotiate with a potential suicide — the sister of the detectives’ murder suspect.