Once upon a time in the African country of Botswana, there was a little girl who would grow up to be one of the most famous detectives in the world: Precious Ramotswe of the No. 1 Ladies' Detective Agency. When Precious finds out that all schoolfriend Nancy has of her missing parents is a photograph and a necklace, she offers to help. Precious and Nancy find themselves on an exciting adventure that takes them into the remotest parts of Botswana in their search for Nancy's family.