Cormack and Sam uncover what happened the night Zoe went missing. Cormack returns to Brisbane to throw himself into the search for Ritchie.

The discovery of Zoe's remains sends shockwaves through the community, particularly for those clinging to hope that Zoe was still alive.

The field of suspects narrows. Sean's computer reveals a history of despicable behaviour towards women, including the photos taken of Zoe without her consent.

Cormack invites Sam to examine the contents of Zoe’s backpack and probe her memory for clues. Re-examining CCTV footage from the night she disappeared, Cormack discovers Zoe actually drove to Xanadu, the rural property where Joseph was living.

New evidence gives Nadja and Sam hope that Zoe is still alive. But as Cormack puts together a timeline of Zoe’s disappearance, the old theory that Zoe drove to Brisbane doesn’t add up.

In 2003 Zoe Jacobs disappeared during her 21st birthday party. Many believe that Zoe ran away but others suspect she was murdered. When police officer Sam Kahlil discovers Zoe’s blue backpack, Detective James Cormack is called in to investigate.