Composer John Berger is plagued by marital problems and struggling with a deadline for the music for an operetta. When he is visited by the muse of music, Polyhymnia, the melodies begin to flow, but she also causes a lot of complications in his earthly life. Like John's wife Irene, she falls in love with flight lieutenant Harry, while her father Zeus looks on disapprovingly and decides to intervene. Meanwhile, the premiere of the operetta is fast approaching.

Christensen is the caretaker of a property in the inner city. He is a bachelor and has taken in a poor little girl. The house is inhabited by ordinary people, and the friendly caretaker is like a father to them. Up in the attic lives a whole colony of young artists: actors, dancers, writers and composers. They are poor, but they hold the flag high. They are confident that one day they will have their big breakthrough, and they are working diligently on a revue that their leader, a young musician and composer, has written.

The strict customs regulations have brought about a special type of lawbreaker - smugglers! They abound in all countries, and even in our relatively peaceful country, there are more of them than one would think. The great film director Stenbuk reads sensational articles about a major smuggling affair, and he sends a manuscript back to two writers with the message that if they do not come up with a smuggling-themed manuscript within eight days, they can run and chicken.

It may appear to be smooth sailing, but the atmosphere behind the scenes at Poul and Jørgen's racing team is tense: the big race is just around the corner, and a deposed member of the team is trying to sabotage them. As if that's not enough, Jørgen can't stay away from Poul's girlfriend. The danger of capsizing is therefore imminent - but then Poul's cousin Basse appears.

In broad daylight, a man runs at full speed across the Town Hall Square wearing a dress and white. People stare in amazement as he tries to grab a seat in a phone box to make a call. However, his story is even more incredible than they can imagine.