It's a sprawling story,loosely divided into 9 parts,each one marking a month of the narrator's wife's pregnancy,and also the lives of nine women who lived in the Danzig/Gdansk area,starting from the end of the Ice Ages.
Into this,Grass also adds a talking fish,The Flounder,who has observed life on the Baltic coast for this time,and has advised and criticised both men and women over this age.The flounder is of ccourse the fish from the fairy story"The Fisherman's Wife".
The novel evolves into a very funny and well-written account of the relationship between men and women over the ages,from Stone Age matriarchy to a feminist tribunal judging the Flounder in 1970s West Berlin.Add in some poetry,a side-trip to India and making a TV documentary about restoring Baltic architecture(amongst other things)and you have one of Grass's best novels.Highly recommended.