Zak and the GAC continue their confrontation with a dark presence that has overtaken the Los Feliz neighborhood's infamous hillside mansion. The investigation turns emotional when they conduct an ancient Sumerian ritual to open gates to the other side.

Zak and the crew visit a mysterious Nevada town plagued by paranormal activity. Is a murdered witch's curse responsible for the haunting? Or is it linked to the dark energy vortex created by a cave that once concealed a grisly secret?