This appears like a black comedy, but it is actually a masked tragedy. The male protagonist, the sickly David Davies, who instantly gets bedridden and stays so as soon as he gets into the weird old house of his three sisters, should have been played by Charles Laughton, as the character is very much in his line. The three sisters are extreme characters all three of them, one deaf, one blind and the third one oversensitive to anything, which is a weird company indeed. Their brother instantly believes they are going to kill him, and they would indeed be motivated.
The actual story is, that the derelict small mining town is hit by an earthquake demolishing many houses, and the three sisters as guardian angels and benefactors of the town promise to sponsor their restoration. The problem is they can't afford it, while their brother is a rich industrial baron, so they summon him to help them. He has no intention of doing so and thus leave his three sisters in an awkward position, which they can't accept.
He has a secretary, Nova Pilbeam, who is his ony support in the gradually more serious intrigues conducted against him, and she is always lovely to look at. The film peters out in a genetral derailing of the intrigue, and the end is not satisfactory. You would have wished the three weird sisters to go on undisturbed. The main asset and attraction of the film is that parts of the script were written by Dylan Thomas, which makes the dialogue at times extremely relishable.