Jazz is hip! Whether in the club or in the dance palace, swinging rhythms are now en vogue again. Yet few people know about the roots of this music, which conquered the dance floors of towns and cities all over the world 100 years ago. What exactly is jazz, and how did it find its way to Germany? Why did the Nazis oppose it and why were swing kids sent to forced labor camps and jazz musicians sent to concentration camps? How did jazz achieve its breakthrough after the war and what significance does it have for jazz musicians today? This fascinating film embarks on a quest to uncover these answers, following a group of young jazz musicians as they delve deep into the origins of this music. Rooted in the present and driven by curiosity, Jazz Fever is a journey searching for the past. It seamlessly combines live performances, rehearsals, interviews, and archival footage to provide a diverse, intelligent, and foot-tapping film that guides us through the rich history of German jazz.