Mma Ramotswe and Mma Makutsi are called to a safari lodge in Botswana's Okavango Delta to carry out a delicate mission on behalf of a former guest. The Okavango makes Precious appreciate once again the beauty of her homeland: it is a paradise of teeming wildlife, majestic grasslands and sparkling water. However, it is also home to rival safari operators, fearsome crocodiles and disgruntled hippopotamuses. What's more, Mma Makutsi still does not have a date for her wedding to Phuti Radiphuti and is feeling rather tetchy herself. But Precious knows that with a little patience, just as the wide river will gently make its way round any obstacle, so will everything work out for the best in the end.

Alexander (R.A.A.) "Sandy" McCall Smith, CBE, FRSE, (born 24 August 1948) is a Zimbabwean-born Scottish writer and Emeritus Professor of Medical Law at the University of Edinburgh. In the late 20th century McCall Smith became a respected expert on medical law and bioethics and served on British and international committees concerned with these issues. He has since become internationally known as a writer of fiction. He is most widely known as the creator of the The No. 1 Ladies' Detective Agency series.