[2][3][4] The patriarch of a wealthy family fears that he will show up one day in vampire form.

Should this happen, he warns his family not to let him back in his house, no matter how much he begs them.

[1] The latter company was founded in 1971 by Roberto Maldera who also had a main role in the film, and Luigi Mariani.

[1] The Night of the Devils was shot in five weeks starting in late 1971 to early 1972 near Bracciano Lake.

[6] Andrews stated that despite "the brief surrealist promise of the opening scenes-a close-up of a face crawling with larvae cutting ingeniously to Niccola's head enveloped in the serpentine wires of an encephalograph", Night of the Devils had "all the usual defects of a low-budget horror quickie-careless direction, mechanical performances, some obtrusively unconvincing day-for-night sequences" find that the film "provides little in the way of style to compensate for a story which staggers dully from one bloodthirsty set-piece to another.