Following a painful breakup, Sarah Smith (Lily Rabe) embarks on a post-fire stream survey for the Forest Service in southern Oregon. A journey down a wild and scenic river leads her to a remote wilderness surrounded by scorched landscapes. Here she first senses being followed by a presence that will not reveal itself. Visitation from the “big man” (Isaac C. Singleton Jr.) continues, more overtly, at the remote cabin to which Sarah repairs to write up her fieldwork. A budding romance with a wilderness advocate (Jason Butler Harner) she met on her trip leads to surprising revelations about the government and sasquatch, and conflicting agendas, that force Sarah to take bold steps to protect the privacy of her big friend, as well as her own.