Bassie and Adriaan have a diamond named after them. Escaped from prison, diamond thieves B1 and B2 attempt to steal it, dressing as Bassie and Adriaan. The actual Bassie and Adriaan are given three days to prove their innocence.

Bassie and Adriaan take a well-earned holiday but find themselves chased by two diamond thieves, referred to as B1 and B2. The crooks mistake Bassie for the go-between who came to collect the key to the vault of the stolen diamonds.

The story of Operation Market Garden—a failed attempt by the allies in the latter stages of WWII to end the war quickly by securing three bridges in Holland allowing access over the Rhine into Germany. A combination of poor allied intelligence and the presence of two crack German panzer divisions meant that the final part of this operation (the bridge in Arnhem over the Rhine) was doomed to failure.