Willy goes to probate court, he had hoped for a good inheritance, but his uncle only left him a rust-bucket of a minibus. Willy (trumpet) and his friend Franz (slide trombone), are musicians with the Bambus (bamboo) Band. They are still planning to take their vacation trip to the south, to Trieste, Italy, and on to Yugoslavia, only now they will use their own minibus. Willy tells Franz, "under one condition: no women." Later, in the Bambus Bar, management holds a singing talent competition. Barbi Lothar wins 1st prize, Till Hartmann wins 2nd prize -- both prizes are the same: they each receive a voucher for a 14-day bus vacation trip to the south. Willy and Franz decide to take the winners with them on their vacation, in their own junk-heap of a minibus. Some friends of the winners join: Barbi insists she takes Harry with her as an escort, and Till will take his girlfriend Petra with him. Some band members also want to come along, too. And so this trip, originally for 2 persons, ...