When Bartos, the director of the Odeon variety theater, cancels an artist at short notice, he hires the Terrys out of necessity, whose parents were successful variety artists, but who had not yet received an engagement themselves. Both are supported by Tobs, a friend of their parents. While blonde Mara Terry arrives punctually for the first rehearsal, her dark-haired sister Kora is late like a diva and acts aloof and snippy. At their first performance together the next day, Kora is overtired from partying the night before. During a dangerous act in which she has to balance her upside-down sister on her head, she becomes careless...