On November 13, 1974, police discovered six members of the DeFeo family shot dead at in the quiet village of Amityville, New York. Eldest son Ronald was found guilty of the murders. After a new family moves in, reports of demonic possession and poltergeist activity grab world-wide attention. With eyewitness accounts and archival footage, we explore the facts and reveal new evidence behind the "Horror." Was there an element of truth behind the tales that still abound today, or was the whole thing an elaborate hoax?