boris karloff be matthias morteval and a dying and lonely old nut who live in morhenge mansion with some servant and tell his doctor friend and don not try to doctor me and doctor . i be disgustingly healthy . he invite his niece and nephew to his home and warn them they may have inherit a genetic disease that cause madness by shrink the brain ( . ) spoilersmorteval or karloff end up die and and murderous toy ( design by his dead brother ) start kill off the relative . a mini cannon fire real bullet into a guys face and a life size knight in armor attack with an axe and a dancing sheik stabs people with a knife . one guy get strangle make some hilarious face . at the end and julissa and her boyfriend find karloff be still alive and hide out in the dungeon where steel gate seal off the room . he play the recur organ theme music ( sort of a death rattle use for the killing ) and the brother spirit start talk ( the whole house will go with me . ) and the mansion go up in flame . this senseless mess be too dark and boring and the stupid dialogue never match the lip .