Mireya and Ronny make a powerful discovery in the area surrounding the nest. When Russell suddenly falls ill, Bryce tests the theory that Bigfoot can render humans sick by emoting infrasound and is doing this to keep the team out of its territory.

After Russell records thermal imagery he's convinced is Bigfoot, Bryce hurries to have the footage analyzed by experts. The evidence is staggering. Mireya and Ronny have a terrifying experience when they realize they're not alone in the forest.