George and Margaret Keller don't suspect that the man terrorizing their city could be a member of their own family; as it dawns on them that their son hides a sinister secret, they must decide whether or not to turn him in.

Wallace Jeffs grows up believing his half-brother, Warren, will guide his family to salvation; when his nephew reveals Warren's true nature, Wallace must choose between loyalty to his family or to his church's new prophet.