Zak and the crew venture to California's first oil boomtown to investigate reports of ghostly activity inside its buildings and glowing anomalies in the surrounding hills; chaos ensues as the guys attempt to unravel the mystery of Mentryville.

Zak and the crew visit the King Gillette Ranch, a sprawling compound built on sacred land. Its dark history plus a brush with a religious cult has birthed violent spirit activity that drains the living of their energy, making this the GAC's heaviest investigation yet..