Written in 1987, this is a typical Murdoch work. It is a literary, well-structured, symbolic melodrama that focuses on intellectuals working through their issues, with the arc centered around a particular pivotal event. The strong central characters dominate the narrative, while the development of minor people and relationships enriches the dense story. There is always a drive towards a hoped-for finale, but invariably, after all the action in all her novels, there is a real sense that "well, life goes on".
A group of fifty-somethings from Oxford University meet at a reunion. There is aristocratic Rosie, bossy bi civil servant Gerard, Jewish Jean and her diplomat husband Duncan, rich widow Lily and her young unemployed partner Gulliver, and smarmy gay teacher Jenkin. The group has funded David Crimond, since they were students, to write a book on Marxism. They are joined by family friends such as virginal Tamar, her unsympathetic mother Violet, Gulliver, Conrad, and others. Unexpectedly, David turns up at the party, and Duncan ends up being pushed in the river. Jenkin has always fancied Gerard, Tamar wants the love her mother fails to give, and the group, now clearly not lefties, wonder where the book is going. David is the cause of unrequited love for several of the women. The main dynamic is that early on, we learn that Jean had an affair and would readily leave Duncan (but still loves him really).
This is one of Murdoch's longest novels, so it might not be the best choice as your first Murdoch to try. It did drag a little, but quite a lot happens. I can imagine that if you aren't used to her style, it could all become very tiresome and give the impression of a "read one read them all" scenario. However, actually, her novels are so well written, clever, and slightly surreal that they always end up being a good read. This one is probably one of her best examples.