A case of survival…

Glacier Peak rises 5,526 feet above the northernmost reaches of the Cascade Mountain Range. Drawn by the beauty and isolation of the rugged wilderness, the Stark's plans a weekend of rock climbing, hiking, and adventure.

Russ Stark will pilot the family helicopter and use the trip as an opportunity to teach his sons, Bobby and Brandon, the basics of flying. After selecting what appears to be the perfect landing spot two miles from the mountain and less than two miles from their campsite, the weekend seems destined to be unforgettable.

What they don't know is someone is watching their every move.

When an explosion sends the helicopter crashing into the mountain, Bobby, Brandon, and Russ find themselves in a desperate fight for survival. Battling brutal terrain and unforgiving elements is only the beginning.

As they struggle to find a way home, the Starks realize they are being hunted by something they can’t see. Every clue raises more questions, and every step deeper into the mountains brings them closer to the deadly truth.

To survive, the brothers must uncover who is after them and why. But time is running out. If they fail… the invisible enemy will finish what the mountain could not.

The phenomenon deepens…