A quadruple murder rocks a small California town, leading police to investigate a refugee camp run by a local man. What appeared as a quiet, small community soon reveals itself as a sinister group full of manipulation, abuse, and violent rituals.

The Gatekeepers saw themselves as pure participants in a religious quest to cleanse the world. When a member challenges the cult's radical leader, cops discover how he paid for his disobedience with his life. Now his killers are nowhere to be found.