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...