Left alone on the vast cattle station with her baby while her husband, Alex, works the farm, Hallie Donaldson is having trouble adjusting to the flies, dust, snakes and isolation in the Flinders Ranges.

At least today, Hallie knows that she and their daughter Ruby can watch Alex on the security camera erected at the windmill where he'll be working. But something goes horribly wrong and he suddenly disappears from view.

Alex is found later, dead at the bottom of the windmill.

After Alex's death, Hallie discovers an alarming series of phone messages sent to a still-shared link on Alex's phone. A short time later, one of Alex's close friends from agricultural college, Danny Betts, loses his life in another tragic rural accident.

When Hallie reveals the horrifying information she's been keeping secret to Detective Dave Burrows and his partner, Constable Mia Worth, they quickly realise that all is not what it seems.