There was in the 1920s on stage and the 1930s in the movies a genre of 'Old Dark House' shows, so-called for the J.B. Priestley novel of the same name. Priestley's novel was eventually made into a wonderful movie by James Whale with some great stars playing people with ordinary problems who are forced to take shelter from the storm in an ancient house inhabited by lunatics.
But what, this movie asks, do you do if you live in an ancient house, you are bored out of your mind and a horde of lunatics descends on you during a storm? Well, you have this movie, which is quite all right, although not a patch on Whale's movie, being hampered a bit by competent but not great actors, stagy direction and a plot which distracts you from the potentially interesting performances. Definitely worth a look, but you won't be coming back for a second show.