Willem en Adriaan is terug vir hulle derde avontuur saam! Nadat hulle Europa en die Indiese Oseaan deurkruis het, is hulle dié keer op eie bodem doenig: in die Bosveld, waar daar in die gebied rondom tannie Lolla se plaas op renosters jag gemaak word. Willem-hulle word ingeroep om die stropers te help aankeer. Willem and Adriaan are on their third mission together: they must investigate the poaching of rhinos on Aunt Lolla’s farm in the Bosveld. Very topical plot, and full of humour, as readers have come to expect from this duo!