Die unentschuldigte Stunde.

Biggi is about to take her high school diploma. To avoid an impending chemistry exam, she fakes an illness. She obtains the necessary certificate from the handsome doctor Dr. Weiringk. She promptly falls in love with her savior and marries him. However, as the young wife of a busy doctor, Biggi soon feels abandoned. Professor Dr. Weiringk, her father-in-law, thinks little of her. She says she's only distracting his son from his homework. That's just one of the reasons for her decision to retake her high school diploma. Biggi secretly goes back to school. The double life as wife and student proves to be exhausting.