When Bassie & Adriaan are in Madrid, they hear that the package must be somewhere near Valencia. They travel there immediately. But the Baron is there first and is preparing a nasty plan. And what kind of plan is that? Bassie and Adriaan find out when they arrive in Luxembourg after many wanderings. There, they not only meet the Baron, B100, and Handy Harry, but they also find out who the mysterious client is.
