With one team member down, Russell and Mireya head back into the forest to hunt down their leads; their intense investigation uncovers their first pieces of possible Bigfoot evidence.

As Bryce works with Jeff Meldrum to analyze the hair sample, Russell discovers a structure he believes is a Bigfoot nest; new team member Ronny joins Mireya in a race to the nest to collect DNA samples that will break open the investigation.

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.

The team plants tiny trackers around the clearing hoping they will cling to Bigfoot's fur. Mireya and Ronny return to where they heard whistles and saw glowing eyes. This time they have a plan: Mireya agrees to be bait in order to lure out Bigfoot.

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.

Mireya’s darkest nightmare comes true. Russell investigates a possible Bigfoot underwater passageway. Bryce secures an airship to survey the final square miles for Bigfoot's heat signature.

The team believes they’ve finally narrowed down where Bigfoot has been hiding throughout their expedition. A high-tech drone is brought in to investigate, and what takes place next is truly astonishing!