in short summary of the story The Return Ngugi Wa Thiong'o The Return is story about Kamau, a man returning home after spending many years away in prison. Kamau has both survived the Mau Mau and being put in prison.
The Mau Mau had cost many Black Nationalist's lives, and had seen many more put away in jails.
There are more to summarise but at least you have an idea.
"A tiny white diamond sparkled on her finger" technically has an error since there should be a comma after "tiny" although this is becoming more common usage.