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 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.