In a far North Queensland town, a time capsule is unearthed at a local high school, plunging the town back into the past and the unsolved murder of one of its students.
In 2003 Zoe Jacobs disappeared from the picturesque town of Moorevale during her own 21st birthday party. She packed her things into a blue backpack and walked out, withdrawing all her cash and leaving behind a note.
The 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 – it appears she didn’t leave Moorvale that night.
Cormack invites Sam to examine the contents of Zoe’s backpack and probe her memory for clues. Sam clocks a Jacobs Family Construction flyer with the word Sapphire written on it in Zoe’s handwriting.
The discover of Zoe’s remains sends shockwaves through the community, particularly for those clinging to hope that Zoe was still alive. Even Leo, who had grieved the loss of his daughter years ago, is distraught.
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 is hot on the heels of Zoe’s killer after Julie is thrust into the spotlight. But it turns out that Leo had been lying about his alibi all along, and a revelation regarding the anonymous caller has Cormack racing against the clock to get to Sam.
In Ashford, North Queensland, residents of the town gather at the local high school to unearth a time capsule, which was interred by students from the 'class of 94'. Among the items of nostalgia is a letter from Isabel Baker who was murdered a week before it was buried.
After the discovery of Isabel's hair those involved with the time capsule project in 1994 are at the forefront of Cormack's inquiry. He makes a huge discovery when the blue car seen following Isabel on the night of the murder shows up on the time capsule documentary.
Rumours and gossip are spreading around Ashford and suspicion is cast over Joe. Cormack tracks down the owner of the blue car, Ezekiel, who has since died. He discovers that Ezekiel's cousins went missing in Ashford around the time of Isabel's murder.
Cormack investigates the link between Ezekiel's missing cousins and Isabel's murder. He probes Joe about his connection to Ezekiel, but Joe refuses to cooperate. Billy Hopkins claims to have evidence implicating Steve Walcott.
Billy Hopkins is involved in a motorbike crash hours before he was due to meet with Cormack. Turner concludes it was an accident, but Cormack suspects foul play. He is starting to think that Billy's fate, the missing workers and Isabel's murder could all be connected.
Cormack tries to track down and question Anton, but he's disappeared. Kalana is also missing. Fearing the worst, Cormack and Hazel race into the cane fields to find Kalana and confront Anton. When they get there, they discover there is one final twist to this tale...
