Jan is a young jazz conductor, who after a failed tour in Sweden turns money-free home to Copenhagen along with his three musicians.
On the run from angry Swedes, without jobs and nowhere to live, Jan moves with his orchestra into the apartment of his estranged uncle, the music professor. When the rent is due and the young woman Maj knocks on the door to ask for music lessons from the professor, Jan sees no other way out but to play the part. And soon he is head over heels in love with Copenhagen.—Nordiskfilm