In 1994, the murder of 17-year-old Isabel Baker shocked her Australian South Sea Islander community. The case was never solved but 25 years later the opening of a time capsule unearths a secret that puts Detective James Cormack on the trail.

In season 2, cold case Detective Cormack tackles two separate missing persons cases. One is professional, as he investigates the disappearance of Zoe Jacobs, who hasn't been seen since her own 21st birthday party in 2003. And the other is personal, as Cormack searches desperately for his own younger brother, who went missing when they were children.