Glen and Lily are content creators who investigate unexplainable activity. Their next expedition is to Mount Adams, where locals claim to see weird red lights and strange demon-looking creatures. A string of interviews suggest that it could be aliens, monsters, or demonic creatures straight out of the Bible terrorizing the mountain once a year. When Glen, Lily, and their team go camping during the fated night, they come to discover the terrifying truth about what happens on Mount Adams.