Retired tax official Willi Winzig spends his retirement happily and contentedly in his home. However, this changes when his sister Heidelinde, her daughter and his father want to move in with him, and as Willi is a good-natured man, he takes them in, but because they have no money and his pension is not enough for all four of them, he has to take on a new job. He gets a job as a salesman for household appliances, but his good nature gets in the way again.

Willi Winzig is a small tax officer with a big heart. He sometimes lets the tax files of his insolvent fellow citizens disappear into the air shaft. But shortly before his retirement, the shaft is so full that Willi has to dispose of the file of a penniless taxpayer in the wastepaper basket. The scam is promptly discovered and Willi is threatened with a hefty fine - even dishonorable dismissal from the civil service. Fortunately, friend and colleague Felix Klein knows what to do.

Summer in Germany, anno 1970. Italy is the number one destination. As every year, swarms of Teutonic tourists make their way to the Adriatic Sea. Only Willi Hirsekorn from Castrop-Rauxel has so far no plans to break south. That changes, however, as the bitchy neighbor Mizzi Buntje proudly tells of their upcoming holiday in Italy. Willi can not afford this boasting. Shortly determined, the bags are packed, and already rushes Willi in the car with his wife Sieglinde, daughter Lotti and son Kuno the sun.

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