When the target of a police investigation is found murdered, Rhys and Sam uncover a web of diamond smuggling, infidelity and workplace corruption. Meanwhile, Priscilla is seduced into a dangerous relationship with an Iraq war veteran, and Finch demands results when a sting operation ends in disaster for the cops.

Sam and Rhys discover a dead pimp and an underage prostitution racket while searching for a runaway teenager. Roxanne goes undercover on the streets of Kings Cross to locate a schoolgirl suspected of murder.

Sam and Rhys suspect an armed robber of a revenge killing, but the investigation takes a surprise turn when the murder weapon is discovered. Priscilla fears for her career after an embarrassing mistake at a crime scene.

When a man is found with a stake through his heart, the detectives investigate the world of suburban vampires. It's assessment time for the probationary constables and Priscilla and Dan will do anything to pass. Tragedy strikes the L.A.C when one of the team is shot during a brawl in a local cemetery.

When a local teacher is killed, the detectives are convinced a notorious standover man is responsible. Nathan questions his judgement as he struggles to deal with the impact of killing a homeless man.

Sam and Rhys investigate the murder of a vet with an elaborate double-life as a swinger. Priscilla reunites a missing person with his brother, with surprising results. Sam's romantic plans with Zac are thrown into disarray by an unexpected proposal.

Nathan and Priscilla are stuck in a house booby-trapped with elaborate home-made explosives. A dispute over a winning lottery ticket helps the detectives solve the murder of a cross-dresser.