The first intoxication of love gives way to a kind of high-altitude fever for Hannes: the air at 1800 meters altitude is slowly becoming too thin for the Hamburg sea dog. He misses the sea air and the sound of the sea - and of course his fish trade. When the picturesque idyll in the alpine heights finally got to be too much for him one day, he decided to flee back to his beloved hometown of Hamburg. However, not everything is for the best there either: Hannes' fish shop is broke. In order to make ends meet, the penniless Hannes hires himself out as a hooker in a nightclub in St. Pauli. Meanwhile, his spirited wife Rosa is seething with anger and disappointment. But she doesn't want to give up the love of her life that easily. She follows Hannes to the Elbe to talk to him. However, the jealousy of the planned reconciliation thwarts the plan. As soon as she arrives in Hamburg, Rosa meets a likeable EU Commissioner who invites her to dinner with the American Secretary of Commerce. Of course, the jealous Hannes doesn't let this "flirt" sit on him. In order to prove to Rosa that he still has great chances with women, the bon vivant ties up with an extremely attractive pharmaceutical representative.