Italian horror directed by Mario Bava. When Dora Baldini (Daria Nicolodi), her son Marco (David Colin Jr.) and her new husband Bruno (John Steiner) move back into the house she once shared with her late first husband Aldo (Ivan Rassimov), they soon realise that Aldos spirit never left the house. When Marco becomes possessed by the ghost of his late father, Dora tries to persuade Bruno that they should leave but he believes it is all in her head. Can they figure out what the spirit wants in order to get him to leave?