Black Demons on AllMovie

Three tourists in Brazil inadvertently get involved in an ancient curse when one of them accepts an amulet of the Macumba loa, Ogum. The trio are a brother and sister and the sister's boyfriend, who foolishly accepted the amulet during a possession ceremony. Not only was he foolish enough to accept a charged amulet, but he even taped the ceremony. This leads to disaster when, after the trio have settled in at an old mansion, he plays the tape back. Out of the ground come six black zombies, bent on revenge for sufferings they endured while living. Each zombie is pledged to kill one white person in repayment for what they endured as slaves.