They're trying so hard to make this 60's thriller Hitchcockian, but it just misses. Olivia De Havilland plays the most annoying wealthy woman you could imagine (so much so that you end up siding with the hoods - but more of that in a minute). She completely overacts like (probably) the drama queen she was (as an actress) and the film is held together more by the young James Caan, actually in a lesser role.
It's about this rich woman who annoys everyone she comes into contact with, including her son, who, unknown to her for most of this film, has left her a note upstairs telling her to shove it and that he's off! He leaves the house, she's in the lift (which is a domestic one, hanging in the open) going up to read the note, but never gets there. She's had a hip replacement, I think, for the lift.
There's a power cut and the lift breaks down mid-height. She's trapped (and starts whinging and whining to herself - and the camera, as there is nobody else to show off to)! A tramp happens by, starts to work out what's going on and helps himself to valuables around her - then off to the pawn shop to fuel his need for booze. He has a female friend he ropes in, then they're both at it.
The owner of the pawn shops gets tipped off, so he's in on the act and James Caan and his friends overhear what's happening so the three of them jump in on the action, too! Meanwhile the snooty rich woman dangles in the lobby. I guess she's supposed to be annoying - so in that sense maybe good acting - but it feels like there's too much enjoyment going on for it to be just a show.
Anyway, James Caan's crowd have some time on their own in there so they start to enjoy the facilities of the house too - drinking, eating, bathing, smashing the place up and with all this, the place turns into Piccadilly Circus! It becomes a bit dark when they realise that the woman can identify them all, so they might have to do something permanently with/to her. (At which point the audience is egging them on!)
There is some suspense and (almost) a dark non-Hollywood ending - with messages in the mix about the distribution of wealth in society, but generally, as I say, it's a bit of a miss. Some of the acting (apart from her) is a bit dated/wooden, but generally that is more a sign of the era than bad acting.
You can see very clearly how and where they are trying to make it Hitchcockian, but I guess there's only one Hitchcock! Still kind of enjoyable and very nearly family entertainment for all - maybe not quite. Available on a handful of streaming services at the time of writing.