When the water level of Raven Lake suddenly drops overnight, Detective Mara Vance is called to investigate what seems like a strange environmental mystery. But beneath the quiet surface of the lake lies a forgotten government facility sealed away for decades — and a terrifying secret no one was meant to uncover.
As Mara dives into the flooded tunnels beneath the lake, she discovers an abandoned containment station, a missing researcher, and evidence of a creature that has been trapped underground since a failed experiment in 1998. When the ancient predator awakens and the station begins to collapse, Mara must race against time to seal the tunnels before the nightmare escapes into the world above.
But the deeper she goes, the more she realizes the truth is far worse than anyone imagined.
Because the monster beneath Raven Lake is not alone.
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