Once upon a time in Botswana in Africa there was a little girl who would later grow up to be a famous detective: Precious Ramotswe of the No. 1 Ladies' Detective Agency. Having already cracked the case of the missing cakes at school, she now has a new mystery to solve.

Precious Ramotswe has two new friends at school and they have the funniest and most resourceful pet you can imagine. But they are upset that their family's most valuable possession, their cow, has gone missing. Precious has a plan to find the missing animal but she needs the help of another in her search. Will she succeed and and what obstacles will she face on her path?