A horror triple bill. In 'Hemoglobin' John Strauss (Rutger Hauer) and his wife Kathleen arrive on a remote North American island, three centuries after an incestuous brother and sister were banished there. John has come in search of a cure for an inherited blood disease, but instead discovers a shocking family history. He hears tales of mutants walking in the night and coffins being smashed open in the nearby graveyard, and becomes determined to get to the bottom of the mystery surrounding his ancestral link to the island. In 'Demon House' a group of teenage friends are out for laughs on Halloween night, but after a shooting incident, in which one of them is wounded and a cop is killed, they take refuge in foreboding Hull House. It is only then that they remember the house is supposedly possessed by demons, but they are still not suspicious when the mysterious Angela approaches them. She then turns the kids against each other, transforming them into gory demonic types along the way. Whilst in 'The Possession - Witchboard 3' an old man's ouija board spells success for Brian Fields, an out of work commodity broker. But when the old man dies, Fields' fortunes take a turn for the worse. Returning to the ouija board for help, he unwittingly opens a portal to a parallel universe, reigned over by the demon Kral.