Disguised as Bassie and Adriaan, B1 and B2 steal a precious diamond. Because of the disguise, Bassie and Adriaan are suspected of the theft, but they are given three days to prove that they are innocent. Eventually they track down the crooks, but they want to smuggle the diamond out of the country to sell it. Bassie and Adriaan will try to return the diamond and put the crooks behind bars.