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.

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.

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.

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 tries to track Anton down to question him, but he's disappeared, and when Cormack and Hazel discover that Kalana is also missing, they fear the worst.

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

Cormack investigates the link between Ezekiel's missing cousins "the lost boys," and Isabel's murder as a new person comes forward with evidence.

When a time capsule is opened and a secret is unearthed, Detective James Cormack is put on the trail of a murderer from a 1994 case that was never solved.

Turner concludes that Billy's death was an accident, but Cormack suspects foul play and believes it's linked to the missing workers and Isabel's murder.

After the discovery of Isabel's hair, those involved with the time capsule project in 1994 are at the forefront of Cormack's investigation.

Rumours spread around Ashford, and suspicion lands on Joe, Isabel's father; as Cormack interviews the time capsule kids, more secrets emerge.