In a movie studio, a fight scene is underway. The hero, played by Allan Bergner, will make an impression on the heroine, played by Ylva Vendel. But Allan is not prepared to give more than one pale hint of fight; he wants to be presentable in later scenes as well. The director wears his hair.
When silly inventor Svensson gets mistaken for Swedish/American aviator Smith, he is accidentally enlisted in the military and drawn into unexpected romantic affairs.