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A brutal massacre at a desert research facility in the middle of Australia awakens horrors across two timelines -1987 and 2024 - dragging Detective Georgia Cooke into a decades-long spiral of obsession and estrangement.

In 1987, Georgia Cooke’s investigation into a mysterious book and a missing scientist pulls her deeper into a dark mystery. In the present, Georgia resists opening up this pandora’s box once again and wants only to see her estranged daughter.

In 1987, Georgia spirals deeper into her obsession with the mysterious Bone Gospel, which she learns is a real book, while in the present day, the investigation into a series of copycat killings leads to the discovery of a podcaster’s body.

In 1987, Georgia uncovers an old case with eerie similarities to the Parrish Station killings. In 2024, Michael presents Georgia with disturbing evidence linking all the murder mysteries.

As the scientists descend into madness and a ritual linked to the signal unfolds in 1987, Georgia and Michael race to find Millie and uncover the truth in 2024 - only to realise the killer they’re chasing has been right under their noses all along.

In 2024, Georgia Cooke and Michael Thorne race to Parrish Station to prevent Callum Parrish fromaccessing the celestial signal and performing his deadly ritual once again…and to save Georgia's daughter Frankie.