Some secrets drag you under...

Freediving champion Alyssa hasn't returned to her lakeside home in Finland since her best friend Tilda drowned there under the ice. Officially, it was a tragic accident, just like the one that claimed Alyssa's father years before. But Alyssa has never understood what made Tilda take such a dangerous risk.

When a family emergency forces her back to the remote town she left behind, old questions begin to resurface. Determined to get answers, Alyssa starts digging into the past. Yet in a community where everyone knows everyone, nobody wants to talk.

Then the warnings begin: threatening messages, sabotaged equipment, strangers watching from the shoreline.

As the anniversary of Tilda's death approaches, Alyssa closes in on a secret far darker than she ever imagined. But the closer she gets, the more dangerous her search becomes. And deep beneath the ice, the truth is still waiting to surface.