Season 1

Prison Valley is rocked by the murder of Prisons Chief Tom Clements; the police think it's part of a wider plot, including the death of pizza delivery man Nathan Leon, and they're running out of time to catch the killer.

When Jim Durgan's body is found in Prison Valley, no one knows why; his estranged wife is drawing a blank and his out-of-state girlfriend can't explain it; what follows is a murky investigation that unravels a sinister murder plot.

When Lea Porter goes missing in Prison Valley, her family members set out to find her; their investigation leads to the discovery of the killer's true identity; as the killer evades arrest, Lea's brother devises a plan to make him confess.

When Dianne Hood is gunned down outside a community centre in Prison Valley, no one can understand why anyone would want to murder the well-liked housewife. The answer involves betrayal, greed and obsession, in an infamous love-triangle murder plot.

The police encounter a bizarre murder case while investigating a deadly home invasion in which Jehovah's Witness Pam Candelario's body is found at the scene and her husband Ralph is brutally beaten.

After teenager Candace Hiltz is shot dead in Prison Valley, the police pursue her troubled brother, James; with no evidence against him, the case goes cold until 10 years later when evidence is discovered in a police officer's storage unit.