The snow won't cover what they've become…
Four friends hike into the snowy wilderness for a photoshoot and surprise proposal, but the adventure takes a dark turn when half the group swims in still water inside a hidden cave, unknowingly exposing the others to a silent threat.
The symptoms hit fast: stabbing ear pain, uncontrollable bleeding, agitation, and hallucinations that push them toward violently harming each other.
There’s no cure.
No mercy.
And no way out of the mountains before the horror lurking in the still water finishes what it started.