Madame Bertini, a newly widowed 70-year-old miser, has lived a sheltered life in squalour. She determines to venture into the modern world and have as much fun as possible, and in doing so finds that she loves it. She blows her life savings, much to the disapproval of the young people around her.

In November of 1939, the British consulate in Norway receives documents saying that the Nazis are conducting secret rocket research in Peenemünde. But the British doubt the authenticity of the so called "Oslo report". Thus, the Germans continue their experiments unimpeded. At the same time, resistance groups from France, England, Poland, and Germany try to find and to sabotage the secret Nazi research base. When the first "V 2" rocket is successfully launched, the Allied commanders finally become interested in the "Oslo report".