Just outside the town of Gaviota, California, a small commune suddenly appears out of nowhere. It is a group of fanatically religious people who want to go back to Nature, and save the earth from the woes and problems Mankind has caused. Outsiders see the commune as just another bunch of harmless social misfits who are bound to fail, as many others have before them. Yet this commune seems to buck the trend and thrives. When a high-level bureaucrat in Washington, D.C. finds that the woman he loves has secretly joins the commune, he is outraged and starts an investigation. It soon appears the commune is not as harmless as it seems, as its members harbor a deadly secret that is threatening the entire human race. The Mind Cleansers shows us what can happen if we tamper with the two most enigmatic structures in the universe: consciousness and the human mind.