At first, there were 18 dead. All members of the Hmong tribe, all from a mountainous province of Laos. They fled their homeland at the end of the Vietnam War and made their way to the United States as refugees. They shared a difficult life – and they shared a terrifying death. Each of them was found in their beds, killed in their sleep by a mysterious affliction that looked like nothing at all.---Welcome to Psychologia, a scientific exploration of the strange and pathological. www.psychologiapodcast.com