After their search through Europe, Bassie and Adriaan are back in the Netherlands. They've found all the packages and outsmarted the crooks at every turn. What Bassie and Adriaan don't know is that the Baron has devised a dastardly plan to trap them again. Together with B100 and Handige Harry (Handy Harry), the Baron lures our friends to Curaçao to finish them off. There, they experience exciting adventures, in which their old friend Vlugge Japie also plays a key role.